Gardeners are sometimes baffled when thinking about a cool season garden – either Fall and Winter or early Spring. We’ve put together this quick checklist to help you see the abundance that can be grown both before and after the traditional Summer garden.
Asian or Mustard Greens are always a success among fall vegetables, and are as easy to grow as lettuce. Sometimes used as edible cover crops. 21 days baby, or 45 days mature.
Arugula or Roquette has a wonderfully mild flavor, becomes large and leafy and rarely bolts when grown in fall.
Endive grown in the fall garden has big, crisp hearts, and taste less bitter compared to spring-grown crops. 40 days baby or 60 days mature.
Beets germinate quickly in the warm soil of late summer or early fall. 35 days to greens, 50 days mature.
Broccoli stays sweeter, richer and produces longer in cooler weather. Choose from the traditional head type or the “shoots and leaves” for some variety. 40 days, may be cut again.
Cabbage should be both direct sown and transplanted after sprouting to extend the harvest. The transplants will mature first, leaving room for those started from seed a couple of weeks later. 60 days from transplanting.
Carrots need a moist seed bed to sprout but will become extra sweet as the soil cools off. 70 days.
Cilantro bolts in hotter weather, but will produce over a much longer time in the fall. Cut and come again.
Cucumbers sweeten up as the weather cools off. Hot, dry weather and lean, poor nutrient soil make them bitter. 60 days, frost sensitive.
Kale is incredibly cold tolerant, yet highly productive and easy to grow. Very nutritious and tasty on a cold fall or winter evening. 30 days baby, 60 days mature.
Lettuce really prefers a cool season and benefits from both direct seeding and transplanting to extend harvests. 60 days, or 30 days from transplanting.
Mache (Lamb’s Lettuce) is a miracle green that grows strongly through winter with minimal protection and fills your salad bowl first thing in spring. 40 days baby, 60 days mature.
Peas are very often overlooked but are a cool season crop that does well in the fall garden. Use an early maturing variety. 50 – 70 days.
Radishes grow well in fall including the familiar salad radishes, huge Daikon, and radish blends.
Spinach can be planted or harvested 3 times. Start seedlings indoors and transplant for an early fall crop, direct sow once soil temperature is below 70F and grow a third crop under a row cover or low hoop house until the coldest part of the winter. 30 days baby, 45 days mature.
Swiss chard is both heat and cold tolerant but produces richer flavors once the first frosts set in. 30 days baby, 55 days mature.
Turnips will give you both tasty greens and crunchy roots that will store for several weeks. 40-50 days.
Spend some time browsing these and making notes on what you like to eat and what varieties do well in what dishes you like to cook – pretty soon you’ll have a mouth-watering list to plant!
https://underwoodgardens.com/wp-content/uploads/2011/07/Cool-Season-Vegetables.jpg478850Stephen Scotthttps://underwoodgardens.com/wp-content/uploads/2019/06/Survey-Header.jpgStephen Scott2017-08-18 16:00:322024-04-30 17:34:00Cool Season Vegetables to Love
Soil Builder vs Garden Cover Up Mix – which is best for your garden?
Both of our cover crop mixes give you multiple benefits in the soil and above it. You can’t go wrong with either one. The Garden Cover Up mix is a general use cover crop, while the Soil Builder mix is more specific toward improving the overall condition of your soil.
Cover crops improve soil in a number of ways. They protect against erosion while increasing organic matter and catch nutrients before they can leach out of the soil. Legumes add nitrogen to the soil. Their roots help unlock nutrients, converting them to more available forms. Cover crops provide habitat or food source for important soil organisms, break up compacted soil layers, help dry out wet soils and maintain soil moisture in arid climates.
It’s always a good idea to maintain year-round soil cover whenever possible, and cover crops are the best way.
Let’s look at how cover crops work overall, then we’ll see the differences of each mix.
Most cover crop mixes are legumes and grains or grasses. Each one has a different benefit to the soil. Legumes include alfalfa, clover, peas, beans, lentils, soybeans and peanuts. Well-known grains are wheat, rye, barley and oats which are used as grasses for animal forage.
Legumes help reduce or prevent erosion, produce biomass, suppress weeds and add organic matter to the soil. They also attract beneficial insects, but are most well-known for fixing nitrogen from the air into the soil in a plant-friendly form. They are generally lower in carbon and higher in nitrogen than grasses, so they break down faster releasing their nutrients sooner. Weed control may not last as long as an equivalent amount of grass residue. Legumes do not increase soil organic matter as much as grains or grasses. Their ground cover makes for good weed control, as well as benefiting other cover crops.
Rye Cover Crop
Grains or grasses
Grain or grass cover crops help retain nutrients–especially nitrogen–left over from a previous crop, reduce or prevent erosion and suppress weeds. They produce large amounts of mulch residue and add organic matter above and below the soil, reducing erosion and suppressing weeds. They are higher in carbon than legumes, breaking down slower resulting in longer-lasting mulch residue. This releases the nutrients over a longer time, complementing the faster-acting release of the legumes.
This pretty well describes what our Garden Cover Up mix does, as it is made up of 70% legumes and 30% grasses.
Our Soil Builder mix takes this approach a couple of steps further in the soil improvement direction with the addition of several varieties known for their benefits to the soil structure, micro-organisms or overall fertility.
For example, the mung bean is a legume used for nitrogen fixation and improving the mycorrhizal populations, which increase the amount of nutrients available to each plant through its roots.
Spring Sunflower
Sunflowers are renowned for their prolific root systems and ability to soak up residual nutrients out of reach for other commonly used covers or crops. The bright colors attract pollinators and beneficials such as bees, damsel bugs, lacewings, hoverflies, minute pirate bugs, and non-stinging parasitic wasps.
Safflower has an exceptionally deep taproot reaching down 8-10 feet, breaking up hard pans, encouraging water and air movement into the soil and scavenging nutrients from depths unreachable to most crops. It does all of this while being resistant to all root lesion nematodes. Gardeners growing safflower usually see low pest pressure and an increase in beneficials such as spiders, ladybugs and lacewings.
Now you see why you can’t go wrong in choosing one of our cover crop mixes! Both greatly increase the health and fertility of the soil, along with above-ground improvements in a short time. Even if you only have a month, the Garden Cover Up mix will impress you for the next planting season.
For a general approach with soils that need a boost but are still producing well, the Garden Cover Up mix is the best choice. Our Soil Builder mix is for rejuvenating a dormant bed or giving some intensive care to a soil that has struggled lately. Both will give you a serious head start in establishing a new growing area, whether it is for trees, shrubs, flowers, herbs or vegetables.
Let one of our cover crops go to bat for you and see what happens when you play on Mother Nature’s team!
https://underwoodgardens.com/wp-content/uploads/2017/06/Cover-Crop-Mix.jpg478850Stephen Scotthttps://underwoodgardens.com/wp-content/uploads/2019/06/Survey-Header.jpgStephen Scott2017-06-28 17:41:502024-06-23 15:20:33Which cover crop mix is best for me?
With a little knowledge and a tiny bit of preparation, you can grow lettuce throughout the summer without bolting. Imagine serving your own fresh-harvested, garden-grown lettuce throughout the summer!
First, some knowledge
Lettuce is a cool-season vegetable, meaning it grows best in temperatures around 60 – 65°F. Once temperatures rise above 80°F, lettuce will normally start to “bolt” or stop leaf production and send up a stalk to flower and produce seed. The leaves become bitter at this stage.
This is because the mainstay of our beloved salads is not a North American native, but an ancient part of our dinner table. Belonging to the daisy family, lettuce was first grown by Egyptians around 4,700 years ago. They cultivated lettuce from a weed used only for its oil-rich seeds to a valued food with succulent leaves that nourished both the mind and libido. Images in tombs of lettuce being used in religious ceremonies show its prominent place in Egyptian culture.
The earliest domesticated form resembled a large head of Romaine lettuce, which was passed to the Greeks and then the Romans. Around 50 AD, Roman agriculturalist Columella described several lettuce cultivars, some of which are recognizable as ancestors to our current favorites. Even today, Romaine types and loose-leaf lettuces tolerate heat better than tighter heading lettuces like Iceberg.
Three factors to growing lettuce in summer
Two factors cause lettuce to bolt and become bitter – temperature and sun exposure.
The temperatures you are concerned about are both air and soil, as a lettuce plant (or any garden plant for that matter) tolerates a higher air temperature if the soil around its roots is cool and moist. Ensuring a cool and damp soil gives you more air temperature leeway. Because lettuce has wide and shallow roots, a drip system on a timer teamed up with a thick mulch keeps it happier in warm weather.
Shade is the third part to keeping lettuce growing vigorously later into warm weather. Reducing sun exposure lowers the heat to the leaves, but also to the soil and roots – creating a combined benefit. Deep shade isn’t good, but a systemallowing sun during the morning while sheltering the plants in the afternoon keeps your salad machines going much longer than you thought possible.
One last bit of knowledge. Most lettuce seeds become dormant (won’t germinate) as temperatures rise above 80°F, a condition called”thermo-inhibition”. This trait is a carryover from wild lettuce in the Mediterranean Middle East, where summers are hot with little moisture. If the lettuce seeds sprouted under these conditions, they would soon die out and the species would go extinct.
Thanks to research, there are some easy techniques to germinate lettuce seeds in warm weather – our article Improve Lettuce Seed Germination shows you how. Now you’ll be able to start lettuce when no one else can!
The three most effective elements in keeping your lettuce producing during warm weather are a drip system on a timer, a good bed of mulch and shade. Let’s look at each one and how they help.
Lettuce growing with mulch, shade & drip system
A drip system on a timer maintains moisture levels much more evenly than hand watering, and the timer can be set for how much and how often water is needed. Checking the soil moisture levels is easy – just push your finger into the soil up to the second knuckle. If the soil feels moist and spongy the moisture is perfect for lettuce. Adjust the number and length of watering each time up or down to maintain this level. From experience, we usually start the timer once a day for 10 minutes in the spring and go to 2 and sometimes 3 times a day for 10 minutes during the heat of the summer. As the weather cools down, we decrease the amount of water accordingly.
This minimizes water stress on all your garden plants, not just lettuce. When the roots have moisture, they can withstand the heat and drying effects better without losing health and slowing production.
A thick bed of mulch reduces moisture loss at the surface of the soil from heat and breezes. Here in central Arizona, it’s not uncommon to have a 15-mph breeze with 90°F+ with 5 – 10% humidity levels. Basically, we garden in a giant hair-dryer!
We use two inches of wood chip mulch, but straw also works well and some gardeners have good success with well-aged compost. With mulch, the soil moisture levels are at the top of the soil where it meets the mulch. Without it, the moisture doesn’t appear until you’ve dug down at least two inches, with three inches having the same amount of moisture as the surface does with mulch. Another benefit of wood chip mulch is it provides needed nutrients to the soil and encourages earthworms and other beneficial soil life as it decomposes. The beds where we’ve put wood chips down have three times the amount of earthworm activity as those that have only compost or nothing at all.
The third element is shade, which might seem daunting but is surprisingly simple to provide. Shade can be from various sources – a living trellis of cucamelon, vine peach or Malabar spinach; a row of tall sunflowers on thewest side of the bed; a container garden on the east side of the house or garage to capture afternoon shade, or a shade cloth structure on the west side of the bed or over a container or raised bed. Trees can also give partial shade – grow on the east side to take advantage of shade during the hotter, more stressful afternoons.
Real world examples
You might be thinking – this all sounds great, but does it work?
Here are two examples showing that it does:
The first example is a study conducted by Kansas City area growers in cooperation with Kansas State University and the Organic Farming Research Foundation.
This project was conducted to test practical methods for extending the production of cool season leafy greens into the hot summer months in Kansas City, where high temperatures normally terminate production of these crops from June through August. We used high tunnels covered with 40% shade cloth, combined with drip irrigation and were able to produce crops of lettuce (10 cultivars) and Asian greens (5 types) throughout the summer. Trials were conducted at three locations, two of them working organic farms, and the other an agricultural experiment station in order to produce statistically valid experimental results.
We produced higher yields of marketable quality lettuce and greens over multiple harvests throughout the summer compared to outside plots, which produced lower yields of poorer quality crops.
As a result of this project, both growers have continued with summer greens production, recognizing that adapted warm-season vegetables may be more profitable under hot summer conditions. *1
The second example is a two-season grow-out test by the Sacramento County Master Gardeners at their Fair Oaks Horticulture Center during the summers of 2015 and 2016.
Grow loose leaf varieties that are heat-resistant or slow-bolting, rather than varieties that form heads.
Provide shade. Use shade cloth or plant on the shady side of taller vegetables.
Don’t skimp on water. Keep lettuce growing fast to prevent wilting, premature bolting, and bitterness.
Mulch lightly with an organic mulch to retain soil moisture.
Use cut-and-come-again harvesting of outer leaves.
Make successive plantings with transplants to replace spent plants.
During the season, replenish soil nitrogen to encourage growth. We used a mild liquid fish emulsion fertilizer.
Inspect plants for insects and diseases. Hand pick and destroy destructive insects. Remove diseased leaves or plants.
Merlot- 42 days to bolting – Dense heads of ruffled red leaves
Jericho – 73days to bolting -Romaine variety from Israel. *2
Easy shade for your garden beds
Here’s a quick and easy way to shade any container, raised bed or row in your garden:
Simple lettuce shade structure
Use 1/2 inch PVC pipe from any hardware store. 1/2 inch is the least expensive and easiest to work with for this use.
Shade structure detail
Using PVC elbows, simply insert the tubing into the elbow and push the uprights into the soil at the edge of the planter or raised bed. No glue needed, so they can be taken down and re-used next season.
Planter with shade system
We used some leftover shade cloth from another project and cable ties to secure the shade cloth to the PVC tubing.
Shade cloth canopy
The front of the shade canopy is left loose so we can harvest easily.
Lettuce shade detail
The right half of the lettuce is shaded, with the left half getting shade as the day progresses.
Now you have the tools and knowledge, so plan on successfully growing lettuce after everyone else has given up this season! As your accomplishments are recognized and compliments roll your way – make sure to share your tools and spread the success.
Update – Three Weeks Later
Lettuce after 3 weeks of heat
Our lettuce looks amazing, considering we’ve had continuous temperatures above 95°F for the past 13 days and above 100°F for the past 9 days. The Sweet & Spicy Mix hasn’t slowed down and is robust, crunchy, and still sweet with no bitter flavors. The growth is easy to see, comparing to the above photos.
Lettuce after 3 weeks of heat – detail of leaves
Looking closer, it isn’t perfect. There are some small holes and some of the leaf edges are a little toasty, but these conditions are so far outside of lettuce comfort zone, it’s like growing on Mars!
Lettuce normally starts to bolt at 80°F, but this has not only survived, but thrived at over 100°F for more than a week and more than 90°F for almost two weeks, this is a technique you should try.
References
1 – Outcome of Shade-covered high tunnels for summer production of lettuce and leafy greens | Organic Farming Research Foundation, Shade-covered high tunnels for summer production of lettuce and leafy greens,
2 – Growing Lettuce in Warm Weather – Sacramento MGs, Growing Lettuce in Warm Weather, http://sacmg.ucanr.edu/summer_lettuce/, University of California, Division of Agriculture and Natural Resources
We’ve greatly enjoyed our own homegrown sprouts for the past several years. There’s just something about their fresh taste and crispy crunch that can be enjoyed any time of year, no matter the weather.
As with all our seeds, we make sure we know who our growers are and where our seeds come from. This is even more important with seeds used for sprouting as they are eaten directly as a food.
We chose our sprouting seeds supplier because of their commitment to the safest and healthiest seeds possible. They showed us their safety standards and testing protocols and we want to share them with you.
Growing your own sprouts at home is much safer than buying them off the shelf at a supermarket, and we’ll show you why.
-The safest sprouts are those you grow at home in a glass jar from a trusted, reliable source that screens the seed and tests both the irrigation water and sprouts for contamination.
-The next best is fresh sprouts from a local, trusted grower who buys their seed from a similar source as above.
-The least safe sprouts are from the supermarket where they have most likely been grown in a different state and trucked in. These sprouts are usually more than a few days old when they are first put on the shelves.
Sprouts are healthy, nutritious and are rich in vitamins, minerals, proteins, enzymes, bioflavonoids, antioxidants, phytoestrogens, glucosinolates and other phytochemicals. They are an excellent alternative to meat, especially for vegetarians and vegans.
There are two main hazards associated with sprouts – E. coli and Salmonella. Both of these terms are used a lot, but what do they really mean? What are they and where do they come from?
“Escherichia coli (E. coli) bacteria normally live in the intestines of people and animals. Most E. coli are harmless and actually are an important part of a healthy human intestinal tract. However, some E. coli are pathogenic, meaning they can cause illness, either diarrhea or illness outside of the intestinal tract. The types of E. coli that can cause diarrhea can be transmitted through contaminated water or food, or through contact with animals or persons.”
“Salmonella is an enteric bacterium, which means that it lives in the intestinal tracts of humans and other animals, including birds. Salmonella bacteria are usually transmitted to humans by eating foods contaminated with animal feces or foods that have been handled by infected food service workers who have practiced poor personal hygiene.”
How to be safe
The best and surest method of reducing the risk of sprout seeds carrying bacteria is making sure the seeds are never contaminated. This starts with an ethical grower using good agricultural practices and organic standards. The next step is conducting rigorous testing, both in-house and independently.
Mung Bean Sprouts
Sprouts seed testing
The testing done on our sprout seeds is different than any other testing protocols for food. There is no acceptable “percentage of contamination”, as is often the case with other foods. If any bacterial contamination is detected, testing is stopped and the entire lot is rejected – sometimes 40,000 pounds or more.
To ensure the sprouting seeds we offer are as safe as possible, our supplier extensively tests both the sprouting water and the seeds to verify if any bacteria is detectable after harvest. Our supplier and an independent lab both do multiple tests to safeguard our health safety.
Current pathogen tests are considered to be 97% accurate in detecting contamination. Duplicate testing at both 48 and 96 hours brings the accuracy and confidence up to 99.91% each time, for a final accuracy of 99. 999919%!
As of early 2017, our supplier is the only company doing these extensive screening and testing protocols. The FDA is studying this protocol and has begun advocating its adoption by sprout companies for testing.
Initial Sprouts Screening Results
Screening includes inspecting the bags for any urine or feces contamination, any holes in the bags, insect larva or other contamination. Afterwards, the seed is carefully inspected with both a magnifying glass and microscope.
Each and every bag is screened – this particular lot had 860 bags, each one weighing 50 lbs. for a total of 43,000 lbs.
In-House Lab Spent Irrigation Water Contamination Test
A small sample of seed is taken from each bag and added to the overall lot sample. The entire sample is sprouted for 48 hours, increasing any potential bacteria level approximately 1,000,000 times over the starting amount, substantially increasing the probability of detection.
Next, the sprout runoff water is sampled and tested by the in-house lab. This is called “spent irrigation water”. A sample of the sprouts is crushed and tested for contamination also. These tests are done in accordance with government food safety and industry accepted protocols.
The lab tests for both Salmonella and E. coli 0157:H7 after 48 hours and again after 96 hours of culturing the irrigation water.
Both bacteria do most of their growth in the first 2 days or 48 hours. This is when the first test is performed, with the second test at 4 days or 96 hours. The second test catches any late developments that might be missed on the first.
Independent Lab Spent Irrigation Water Contamination Test
A separate, larger sample of spent irrigation water is sent to an independent lab for more extensive testing. The independent lab performs a more in-depth analysis on a wider range of pathogens than the in-house lab because of their higher level of equipment.
Notice that the independent lab tests for the top seven strains of E. coli, where the in-house lab tests for the most common one. The lab uses a food microbiology genetic detection system.
This is possible because the specific genes or DNA of the different strains of E. coli have been mapped, so they are specifically targeted during this testing. This gives better accuracy, repeatability, and confidence in the testing than any previous methods.
Independent Lab Sprouting Test
Next, the independent lab tests four pounds of randomly obtained sprouting seed from the shipment. Having an independent, third-party lab analyze the sprouting seeds gives an additional measure of confidence.
Storage Confirmation
Finally, the storage facility is inspected and documented. This ensures the cleanliness and food safety of how the seed is stored to avoid insect or rodent infestation or damage.
Homegrown sprout safety
In a home environment with only one person in contact with the sprouting seeds, cleanliness and food safety is much easier. Here are a few tips for sprouting safely:
Wash your hands thoroughly before handling seeds or sprouts, and use clean glass jars and screens that are washed with soap and hot water just before starting the sprouting process.
Rinse the sprouts well at least twice a day and tip the jar so excess water can drain, avoiding puddles where bacteria can grow.
Rinse the seeds well before starting the initial soaking period.
Now you know the steps taken to ensure the highest quality sprouting seeds are available so you can enjoy the taste and nutrition of sprouts with peace of mind.
Spring onions have been grown for a long time – Egyptians grew them along the Nile during the time of the Pharaohs. One of the easiest vegetables to grow, onions sometimes confuse home gardeners as to the best type for their garden.
Three forms of spring onions can be planted: seeds, transplants and bulbs (or sets):
Onion seeds give the greatest choice but take the longest to grow – up to 100 to 130 days from sowing the seed.
Transplants are simply young onions, like seedlings, grown to the scallion stage then bundled for sale. They grow faster but are the most expensive and fragile option as they are susceptible to transport and transplant shock.
Bulbs are small, dormant onions grown from seed the previous season. They will grow to full-sized onions in about 2 months from planting.
We recommend using onion bulbs, which can be planted without worry of frost damage and have a higher success rate than transplants. Bulbs are perfect for the home gardener as they guarantee onions for use or storage within a few weeks after planting.
As a member of the allium family they are a natural pest repellant to most foraging animals in the home garden.
Note: These details are for growing onion bulbs, not green or bunching onions. To grow green onions, simply plant the seeds and harvest when they are an appropriate size for your use!
Red Wethersfield Onions
Day Length for Spring Growing
Spring onions are usually sorted by the amount of daylight hours they need to grow bulbs; these are known as day-neutral and long day onions. Day-neutral onions form good size bulbs with 12 – 14 hours of daylight, while long-day onions need 14 – 16 hours.
The map above shows the approximate latitudes where long-day onions need to be grown. Day-neutral onions will also grow well in the more northern states in spring and summer.
Day-neutral onions are usually sweeter and juicier than their long-day counterparts. Their higher sugar and water content make them best suited for cooking and immediate use instead of storage. They are best planted from early spring to mid-summer in northern states and early spring to late fall in southern ones.
Candy is our day-neutral onion, being adapted to a wide range of day-lengths from north Texas to Maine. 12 to 14 hours of daylight will produce a good bulb. These can be grown in Zones 5 to 9.
Long-day onions are just the opposite with lower sugar and water content but higher sulphur, making them best for storage and cooking. These are planted in early spring in mid to northern states for fall harvest.
Growing long-day onions in the southern states will give small bulbs, more like scallions than full onions.
Our long-day selections include Yellow Stuttgarter (in the header photo), White Ebenezer and Red Wethersfield onions. They do best with 14 to 16 hours of daylight to form a good-sized bulb and are typically grown in colder winter areas. Zone 6 and colder is a good rule.
Spring onions prefer abundant sun and well-prepared, healthy soil with good drainage.
While onions will grow in nutrient poor soil, they won’t form good bulbs or taste as good. If possible, till in aged manure the fall before planting. Onions are heavy feeders and need constant nourishment to produce big bulbs. If needed, add a natural nitrogen source when planting, such as fish emulsion or aged compost.
Plant onions as soon as the ground can be worked in the spring, usually March or April. Make sure overnight temperatures aren’t forecast to drop below 20°F.
Plant the bulbs about an inch deep and four inches apart. Plant no more than one inch deep, otherwise bulb formation can be restricted.
Feed every few weeks with nitrogen rich fish emulsion to get good sized bulbs. Synthetic nitrogen fertilizer will grow larger bulbs at the expense of flavor. Stop fertilizing when the onion starts pushing the soil away and the bulbing process begins. Do not put the soil back around the onions; the bulb needs to emerge above the soil.
Onions have short roots and need about an inch of water per week, including rain water to avoid stress from lack of moisture. Mature bulb sizes will be smaller if they do not receive enough water. Raised beds and rows are good growing locations.
It is important to keep onion rows weed-free until they become well established. Mulching helps protect them from weeds competing for water, as well as preventing moisture loss from sun and wind.
Stuttgarter Onions
Harvesting Your Onions
Spring onions are ready for harvest when the bulb has grown large and the green tops begins to brown and fall off. The plant should be pulled at this point, but handle them carefully as they bruise easily, and bruised onions will rot in storage.
Onions need to be cured before storing. Cure them with their tops still attached, in a dry location with good air circulation – they can hang on a fence or over the railing on a porch to cure if there is no rain in the forecast. During curing the roots will shrivel and the tops will dry back sealing the onion and protect it from rot. After 7 – 10 days clip the tops and roots with shears, then store them in a cool, dry environment or use for cooking.
With a little experimenting and succession planting, you will find it easy enough to grow most of your own onions throughout the year. After tasting home-grown onions, you won’t want “store-bought” anymore!
https://underwoodgardens.com/wp-content/uploads/2017/03/Ebenezer-Onions.jpg478850Stephen Scotthttps://underwoodgardens.com/wp-content/uploads/2019/06/Survey-Header.jpgStephen Scott2017-03-03 17:10:512024-06-23 15:37:00Spring Onions – When and How to Plant
Salsify, also known as Oyster plant or vegetable oyster, was popular with the ancient Greeks who called it “the billy goat’s beard” for the silky filaments adorning the seed. The Romans increased it’s status, depicting it in frescoes in Pompeii. The famous Roman gourmet Apicius developed several recipes dedicated to Salsify and Pliny the Elder mentions it several times in his writings.
Europeans know the more common and darker scorzonera, meaning “black bark” in Italian. Salsify is regaining popularity with market and home gardeners for the delicately tasty roots and chicory flavored leaves.
Salsify Plant
This cold hardy biennial herb has a moderately thick taproot covered by a light brown skin. It has a purple flower, distinguishing itself from scorzonera by its black root and yellow flowers.
Edible Parts of the Plant
Salsify Root
The entire plant is edible when young and the root is eaten after maturing.
The Salsify root stores its carbohydrates as inulin instead of starch, which turns to fructose instead of glucose during digestion. This is ideal for diabetics as it reduces their glucose load. Most enjoy the flavor of the cooked roots over the raw.
Salsify Seedhead
Planting Seeds
Seeds are direct sown in early March to April then harvested in October. The slender, grass-like leaves normally grow to about 3 feet tall and one purple petalled flower per stalk. As the seeds mature, the flower heads turn into fluffy white puff-balls like dandelion heads and scatter on the wind.
Young Salsify Root
The root is ready for harvest in the fall when the leaves begin to die back. Flavor improves after a few frosts. Dig the roots out whole with a garden spade or fork to avoid breaking them. Only dig what you need at one time, because the roots are best fresh. Salsify will overwinter, tolerating hard frosts and even freezes.
Cool Season Vegetables to Love
Cool Season Vegetables for Your Garden
Gardeners are sometimes baffled when thinking about a cool season garden – either Fall and Winter or early Spring. We’ve put together this quick checklist to help you see the abundance that can be grown both before and after the traditional Summer garden.
Spend some time browsing these and making notes on what you like to eat and what varieties do well in what dishes you like to cook – pretty soon you’ll have a mouth-watering list to plant!
Which cover crop mix is best for me?
Soil Builder vs Garden Cover Up Mix – which is best for your garden?
Both of our cover crop mixes give you multiple benefits in the soil and above it. You can’t go wrong with either one. The Garden Cover Up mix is a general use cover crop, while the Soil Builder mix is more specific toward improving the overall condition of your soil.
Cover crops improve soil in a number of ways. They protect against erosion while increasing organic matter and catch nutrients before they can leach out of the soil. Legumes add nitrogen to the soil. Their roots help unlock nutrients, converting them to more available forms. Cover crops provide habitat or food source for important soil organisms, break up compacted soil layers, help dry out wet soils and maintain soil moisture in arid climates.
Let’s look at how cover crops work overall, then we’ll see the differences of each mix.
Most cover crop mixes are legumes and grains or grasses. Each one has a different benefit to the soil. Legumes include alfalfa, clover, peas, beans, lentils, soybeans and peanuts. Well-known grains are wheat, rye, barley and oats which are used as grasses for animal forage.
Crimson Clover
Legumes
Legumes help reduce or prevent erosion, produce biomass, suppress weeds and add organic matter to the soil. They also attract beneficial insects, but are most well-known for fixing nitrogen from the air into the soil in a plant-friendly form. They are generally lower in carbon and higher in nitrogen than grasses, so they break down faster releasing their nutrients sooner. Weed control may not last as long as an equivalent amount of grass residue. Legumes do not increase soil organic matter as much as grains or grasses. Their ground cover makes for good weed control, as well as benefiting other cover crops.
Rye Cover Crop
Grains or grasses
Grain or grass cover crops help retain nutrients–especially nitrogen–left over from a previous crop, reduce or prevent erosion and suppress weeds. They produce large amounts of mulch residue and add organic matter above and below the soil, reducing erosion and suppressing weeds. They are higher in carbon than legumes, breaking down slower resulting in longer-lasting mulch residue. This releases the nutrients over a longer time, complementing the faster-acting release of the legumes.
This pretty well describes what our Garden Cover Up mix does, as it is made up of 70% legumes and 30% grasses.
Our Soil Builder mix takes this approach a couple of steps further in the soil improvement direction with the addition of several varieties known for their benefits to the soil structure, micro-organisms or overall fertility.
For example, the mung bean is a legume used for nitrogen fixation and improving the mycorrhizal populations, which increase the amount of nutrients available to each plant through its roots.
Spring Sunflower
Sunflowers are renowned for their prolific root systems and ability to soak up residual nutrients out of reach for other commonly used covers or crops. The bright colors attract pollinators and beneficials such as bees, damsel bugs, lacewings, hoverflies, minute pirate bugs, and non-stinging parasitic wasps.
Safflower has an exceptionally deep taproot reaching down 8-10 feet, breaking up hard pans, encouraging water and air movement into the soil and scavenging nutrients from depths unreachable to most crops. It does all of this while being resistant to all root lesion nematodes. Gardeners growing safflower usually see low pest pressure and an increase in beneficials such as spiders, ladybugs and lacewings.
Now you see why you can’t go wrong in choosing one of our cover crop mixes! Both greatly increase the health and fertility of the soil, along with above-ground improvements in a short time. Even if you only have a month, the Garden Cover Up mix will impress you for the next planting season.
For a general approach with soils that need a boost but are still producing well, the Garden Cover Up mix is the best choice. Our Soil Builder mix is for rejuvenating a dormant bed or giving some intensive care to a soil that has struggled lately. Both will give you a serious head start in establishing a new growing area, whether it is for trees, shrubs, flowers, herbs or vegetables.
Grow Lettuce in Summer
Grow Your Lettuce Longer in Warm Weather
With a little knowledge and a tiny bit of preparation, you can grow lettuce throughout the summer without bolting. Imagine serving your own fresh-harvested, garden-grown lettuce throughout the summer!
First, some knowledge
Lettuce is a cool-season vegetable, meaning it grows best in temperatures around 60 – 65°F. Once temperatures rise above 80°F, lettuce will normally start to “bolt” or stop leaf production and send up a stalk to flower and produce seed. The leaves become bitter at this stage.
This is because the mainstay of our beloved salads is not a North American native, but an ancient part of our dinner table. Belonging to the daisy family, lettuce was first grown by Egyptians around 4,700 years ago. They cultivated lettuce from a weed used only for its oil-rich seeds to a valued food with succulent leaves that nourished both the mind and libido. Images in tombs of lettuce being used in religious ceremonies show its prominent place in Egyptian culture.
The earliest domesticated form resembled a large head of Romaine lettuce, which was passed to the Greeks and then the Romans. Around 50 AD, Roman agriculturalist Columella described several lettuce cultivars, some of which are recognizable as ancestors to our current favorites. Even today, Romaine types and loose-leaf lettuces tolerate heat better than tighter heading lettuces like Iceberg.
Three factors to growing lettuce in summer
The temperatures you are concerned about are both air and soil, as a lettuce plant (or any garden plant for that matter) tolerates a higher air temperature if the soil around its roots is cool and moist. Ensuring a cool and damp soil gives you more air temperature leeway. Because lettuce has wide and shallow roots, a drip system on a timer teamed up with a thick mulch keeps it happier in warm weather.
Shade is the third part to keeping lettuce growing vigorously later into warm weather. Reducing sun exposure lowers the heat to the leaves, but also to the soil and roots – creating a combined benefit. Deep shade isn’t good, but a systemallowing sun during the morning while sheltering the plants in the afternoon keeps your salad machines going much longer than you thought possible.
One last bit of knowledge. Most lettuce seeds become dormant (won’t germinate) as temperatures rise above 80°F, a condition called”thermo-inhibition”. This trait is a carryover from wild lettuce in the Mediterranean Middle East, where summers are hot with little moisture. If the lettuce seeds sprouted under these conditions, they would soon die out and the species would go extinct.
Thanks to research, there are some easy techniques to germinate lettuce seeds in warm weather – our article Improve Lettuce Seed Germination shows you how. Now you’ll be able to start lettuce when no one else can!
Here’s how to grow lettuce in summer
The three most effective elements in keeping your lettuce producing during warm weather are a drip system on a timer, a good bed of mulch and shade. Let’s look at each one and how they help.
Lettuce growing with mulch, shade & drip system
A drip system on a timer maintains moisture levels much more evenly than hand watering, and the timer can be set for how much and how often water is needed. Checking the soil moisture levels is easy – just push your finger into the soil up to the second knuckle. If the soil feels moist and spongy the moisture is perfect for lettuce. Adjust the number and length of watering each time up or down to maintain this level. From experience, we usually start the timer once a day for 10 minutes in the spring and go to 2 and sometimes 3 times a day for 10 minutes during the heat of the summer. As the weather cools down, we decrease the amount of water accordingly.
A thick bed of mulch reduces moisture loss at the surface of the soil from heat and breezes. Here in central Arizona, it’s not uncommon to have a 15-mph breeze with 90°F+ with 5 – 10% humidity levels. Basically, we garden in a giant hair-dryer!
We use two inches of wood chip mulch, but straw also works well and some gardeners have good success with well-aged compost. With mulch, the soil moisture levels are at the top of the soil where it meets the mulch. Without it, the moisture doesn’t appear until you’ve dug down at least two inches, with three inches having the same amount of moisture as the surface does with mulch. Another benefit of wood chip mulch is it provides needed nutrients to the soil and encourages earthworms and other beneficial soil life as it decomposes. The beds where we’ve put wood chips down have three times the amount of earthworm activity as those that have only compost or nothing at all.
The third element is shade, which might seem daunting but is surprisingly simple to provide. Shade can be from various sources – a living trellis of cucamelon, vine peach or Malabar spinach; a row of tall sunflowers on thewest side of the bed; a container garden on the east side of the house or garage to capture afternoon shade, or a shade cloth structure on the west side of the bed or over a container or raised bed. Trees can also give partial shade – grow on the east side to take advantage of shade during the hotter, more stressful afternoons.
Real world examples
Here are two examples showing that it does:
The first example is a study conducted by Kansas City area growers in cooperation with Kansas State University and the Organic Farming Research Foundation.
The second example is a two-season grow-out test by the Sacramento County Master Gardeners at their Fair Oaks Horticulture Center during the summers of 2015 and 2016.
Easy shade for your garden beds
Here’s a quick and easy way to shade any container, raised bed or row in your garden:
Simple lettuce shade structure
Use 1/2 inch PVC pipe from any hardware store. 1/2 inch is the least expensive and easiest to work with for this use.
Shade structure detail
Using PVC elbows, simply insert the tubing into the elbow and push the uprights into the soil at the edge of the planter or raised bed. No glue needed, so they can be taken down and re-used next season.
Planter with shade system
We used some leftover shade cloth from another project and cable ties to secure the shade cloth to the PVC tubing.
Shade cloth canopy
The front of the shade canopy is left loose so we can harvest easily.
Lettuce shade detail
The right half of the lettuce is shaded, with the left half getting shade as the day progresses.
Now you have the tools and knowledge, so plan on successfully growing lettuce after everyone else has given up this season! As your accomplishments are recognized and compliments roll your way – make sure to share your tools and spread the success.
Update – Three Weeks Later
Lettuce after 3 weeks of heat
Our lettuce looks amazing, considering we’ve had continuous temperatures above 95°F for the past 13 days and above 100°F for the past 9 days. The Sweet & Spicy Mix hasn’t slowed down and is robust, crunchy, and still sweet with no bitter flavors. The growth is easy to see, comparing to the above photos.
Lettuce after 3 weeks of heat – detail of leaves
Looking closer, it isn’t perfect. There are some small holes and some of the leaf edges are a little toasty, but these conditions are so far outside of lettuce comfort zone, it’s like growing on Mars!
References
Homegrown Sprouts Safety
Are homegrown sprouts safe?
We’ve greatly enjoyed our own homegrown sprouts for the past several years. There’s just something about their fresh taste and crispy crunch that can be enjoyed any time of year, no matter the weather.
As with all our seeds, we make sure we know who our growers are and where our seeds come from. This is even more important with seeds used for sprouting as they are eaten directly as a food.
We chose our sprouting seeds supplier because of their commitment to the safest and healthiest seeds possible. They showed us their safety standards and testing protocols and we want to share them with you.
Growing your own sprouts at home is much safer than buying them off the shelf at a supermarket, and we’ll show you why.
Sprouts are healthy, nutritious and are rich in vitamins, minerals, proteins, enzymes, bioflavonoids, antioxidants, phytoestrogens, glucosinolates and other phytochemicals. They are an excellent alternative to meat, especially for vegetarians and vegans.
Fresh Homegrown Sprouts
Hazards of sprouts
There are two main hazards associated with sprouts – E. coli and Salmonella. Both of these terms are used a lot, but what do they really mean? What are they and where do they come from?
From the CDC website:
“Escherichia coli (E. coli) bacteria normally live in the intestines of people and animals. Most E. coli are harmless and actually are an important part of a healthy human intestinal tract. However, some E. coli are pathogenic, meaning they can cause illness, either diarrhea or illness outside of the intestinal tract. The types of E. coli that can cause diarrhea can be transmitted through contaminated water or food, or through contact with animals or persons.”
From the USDA website:
“Salmonella is an enteric bacterium, which means that it lives in the intestinal tracts of humans and other animals, including birds. Salmonella bacteria are usually transmitted to humans by eating foods contaminated with animal feces or foods that have been handled by infected food service workers who have practiced poor personal hygiene.”
How to be safe
The best and surest method of reducing the risk of sprout seeds carrying bacteria is making sure the seeds are never contaminated. This starts with an ethical grower using good agricultural practices and organic standards. The next step is conducting rigorous testing, both in-house and independently.
Mung Bean Sprouts
Sprouts seed testing
The testing done on our sprout seeds is different than any other testing protocols for food. There is no acceptable “percentage of contamination”, as is often the case with other foods. If any bacterial contamination is detected, testing is stopped and the entire lot is rejected – sometimes 40,000 pounds or more.
To ensure the sprouting seeds we offer are as safe as possible, our supplier extensively tests both the sprouting water and the seeds to verify if any bacteria is detectable after harvest. Our supplier and an independent lab both do multiple tests to safeguard our health safety.
As of early 2017, our supplier is the only company doing these extensive screening and testing protocols. The FDA is studying this protocol and has begun advocating its adoption by sprout companies for testing.
Initial Sprouts Screening Results
Screening includes inspecting the bags for any urine or feces contamination, any holes in the bags, insect larva or other contamination. Afterwards, the seed is carefully inspected with both a magnifying glass and microscope.
Each and every bag is screened – this particular lot had 860 bags, each one weighing 50 lbs. for a total of 43,000 lbs.
In-House Lab Spent Irrigation Water Contamination Test
A small sample of seed is taken from each bag and added to the overall lot sample. The entire sample is sprouted for 48 hours, increasing any potential bacteria level approximately 1,000,000 times over the starting amount, substantially increasing the probability of detection.
Next, the sprout runoff water is sampled and tested by the in-house lab. This is called “spent irrigation water”. A sample of the sprouts is crushed and tested for contamination also. These tests are done in accordance with government food safety and industry accepted protocols.
The lab tests for both Salmonella and E. coli 0157:H7 after 48 hours and again after 96 hours of culturing the irrigation water.
Both bacteria do most of their growth in the first 2 days or 48 hours. This is when the first test is performed, with the second test at 4 days or 96 hours. The second test catches any late developments that might be missed on the first.
Independent Lab Spent Irrigation Water Contamination Test
A separate, larger sample of spent irrigation water is sent to an independent lab for more extensive testing. The independent lab performs a more in-depth analysis on a wider range of pathogens than the in-house lab because of their higher level of equipment.
Notice that the independent lab tests for the top seven strains of E. coli, where the in-house lab tests for the most common one. The lab uses a food microbiology genetic detection system.
This is possible because the specific genes or DNA of the different strains of E. coli have been mapped, so they are specifically targeted during this testing. This gives better accuracy, repeatability, and confidence in the testing than any previous methods.
Independent Lab Sprouting Test
Next, the independent lab tests four pounds of randomly obtained sprouting seed from the shipment. Having an independent, third-party lab analyze the sprouting seeds gives an additional measure of confidence.
Storage Confirmation
Finally, the storage facility is inspected and documented. This ensures the cleanliness and food safety of how the seed is stored to avoid insect or rodent infestation or damage.
Homegrown sprout safety
In a home environment with only one person in contact with the sprouting seeds, cleanliness and food safety is much easier. Here are a few tips for sprouting safely:
Now you know the steps taken to ensure the highest quality sprouting seeds are available so you can enjoy the taste and nutrition of sprouts with peace of mind.
Spring Onions – When and How to Plant
Great Onions in Spring
Spring onions have been grown for a long time – Egyptians grew them along the Nile during the time of the Pharaohs. One of the easiest vegetables to grow, onions sometimes confuse home gardeners as to the best type for their garden.
Three forms of spring onions can be planted: seeds, transplants and bulbs (or sets):
We recommend using onion bulbs, which can be planted without worry of frost damage and have a higher success rate than transplants. Bulbs are perfect for the home gardener as they guarantee onions for use or storage within a few weeks after planting.
As a member of the allium family they are a natural pest repellant to most foraging animals in the home garden.
Red Wethersfield Onions
Day Length for Spring Growing
Spring onions are usually sorted by the amount of daylight hours they need to grow bulbs; these are known as day-neutral and long day onions. Day-neutral onions form good size bulbs with 12 – 14 hours of daylight, while long-day onions need 14 – 16 hours.
The map above shows the approximate latitudes where long-day onions need to be grown. Day-neutral onions will also grow well in the more northern states in spring and summer.
Day-neutral onions are usually sweeter and juicier than their long-day counterparts. Their higher sugar and water content make them best suited for cooking and immediate use instead of storage. They are best planted from early spring to mid-summer in northern states and early spring to late fall in southern ones.
Candy is our day-neutral onion, being adapted to a wide range of day-lengths from north Texas to Maine. 12 to 14 hours of daylight will produce a good bulb. These can be grown in Zones 5 to 9.
Long-day onions are just the opposite with lower sugar and water content but higher sulphur, making them best for storage and cooking. These are planted in early spring in mid to northern states for fall harvest.
Our long-day selections include Yellow Stuttgarter (in the header photo), White Ebenezer and Red Wethersfield onions. They do best with 14 to 16 hours of daylight to form a good-sized bulb and are typically grown in colder winter areas. Zone 6 and colder is a good rule.
Sweet Candy Onions
Planting and Growing Spring Onions
Spring onions prefer abundant sun and well-prepared, healthy soil with good drainage.
While onions will grow in nutrient poor soil, they won’t form good bulbs or taste as good. If possible, till in aged manure the fall before planting. Onions are heavy feeders and need constant nourishment to produce big bulbs. If needed, add a natural nitrogen source when planting, such as fish emulsion or aged compost.
Feed every few weeks with nitrogen rich fish emulsion to get good sized bulbs. Synthetic nitrogen fertilizer will grow larger bulbs at the expense of flavor. Stop fertilizing when the onion starts pushing the soil away and the bulbing process begins. Do not put the soil back around the onions; the bulb needs to emerge above the soil.
Onions have short roots and need about an inch of water per week, including rain water to avoid stress from lack of moisture. Mature bulb sizes will be smaller if they do not receive enough water. Raised beds and rows are good growing locations.
It is important to keep onion rows weed-free until they become well established. Mulching helps protect them from weeds competing for water, as well as preventing moisture loss from sun and wind.
Stuttgarter Onions
Harvesting Your Onions
Spring onions are ready for harvest when the bulb has grown large and the green tops begins to brown and fall off. The plant should be pulled at this point, but handle them carefully as they bruise easily, and bruised onions will rot in storage.
Onions need to be cured before storing. Cure them with their tops still attached, in a dry location with good air circulation – they can hang on a fence or over the railing on a porch to cure if there is no rain in the forecast. During curing the roots will shrivel and the tops will dry back sealing the onion and protect it from rot. After 7 – 10 days clip the tops and roots with shears, then store them in a cool, dry environment or use for cooking.
With a little experimenting and succession planting, you will find it easy enough to grow most of your own onions throughout the year. After tasting home-grown onions, you won’t want “store-bought” anymore!
Salsify – the Vegetable Oyster
An Ancient Vegetable
Salsify, also known as Oyster plant or vegetable oyster, was popular with the ancient Greeks who called it “the billy goat’s beard” for the silky filaments adorning the seed. The Romans increased it’s status, depicting it in frescoes in Pompeii. The famous Roman gourmet Apicius developed several recipes dedicated to Salsify and Pliny the Elder mentions it several times in his writings.
Europeans know the more common and darker scorzonera, meaning “black bark” in Italian. Salsify is regaining popularity with market and home gardeners for the delicately tasty roots and chicory flavored leaves.
Salsify Plant
This cold hardy biennial herb has a moderately thick taproot covered by a light brown skin. It has a purple flower, distinguishing itself from scorzonera by its black root and yellow flowers.
Edible Parts of the Plant
Salsify Root
The entire plant is edible when young and the root is eaten after maturing.
Young roots are eaten raw in salads, or are boiled, baked, and sautéed once mature. They are added to soups or are grated and made into cakes. The flower buds and flowers are added to salads or preserved by pickling. Young flower stalks are picked, cooked, dressed and eaten like asparagus. The seeds are sprouted and eaten like alfalfa sprouts for a refreshing and unique flavor addition.
Salsify Fritter
Cooked and puréed roots coated in egg batter and flour then pan or deep-fried to a crispy golden brown make Salsify fritters.
The Salsify root stores its carbohydrates as inulin instead of starch, which turns to fructose instead of glucose during digestion. This is ideal for diabetics as it reduces their glucose load. Most enjoy the flavor of the cooked roots over the raw.
Salsify Seedhead
Planting Seeds
Seeds are direct sown in early March to April then harvested in October. The slender, grass-like leaves normally grow to about 3 feet tall and one purple petalled flower per stalk. As the seeds mature, the flower heads turn into fluffy white puff-balls like dandelion heads and scatter on the wind.
Young Salsify Root
The root is ready for harvest in the fall when the leaves begin to die back. Flavor improves after a few frosts. Dig the roots out whole with a garden spade or fork to avoid breaking them. Only dig what you need at one time, because the roots are best fresh. Salsify will overwinter, tolerating hard frosts and even freezes.