Hardening Off Those Plants

Curious about what "hardening off" means and why it's important? Here's a blog from our archives to help you prep your cold-season transplants for the great outdoors. 

Plants need to be hardened off before being transplanted. What does this mean? It is the process you take them through to get used to direct sunlight, wind, cold, heat, dryness, and any other weather conditions they will be asked to live through during their lives. When plants are started in the greenhouse, in trays or pots, their world is sheltered and comfortable; food is readily available in the compost-fortified soil, and the temperatures are carefully regulated. Once it is time to go out into the harsh world of the garden, the goods and services become a little more scarce for those baby plants and they go through a bit of withdrawal known as "transplant shock."  Hardening them off gives them a gradual adjustment to this new world.  It is best to start out by putting the plants outside for a few hours, and then bringing them back in; this gives them a small taste of direct sunlight. In any greenhouse, the plastic film filters out 10 to 25% of the sun's rays and the tender plants are literally sun-burned when they first encounter that unmediated light.  Here is how I do it at my house. When you buy plants that were grown by Red Wagon Plants, they have already been hardened off and you can put them right in the ground. The following method is important to follow if you are working with plants that you know are not hardened off yet.

Once they have gotten used to a few hours of sunlight at a time, they can stay outside overnight, but under a protective row cover.

The cover comes off in the daytime and the plants are acclimated to being where they will be planted for a few days.

If the temperatures drop down below freezing, cover them again. Cold hardy plants such as broccoli, cabbage, kale, hardy lettuces, hardy herbs, escarole, scallions, onions can take a frost without a problem, but they will do it with more grace and strength if they have been gradually introduced to those temperatures.

Once the plants have had a few cold nights, under cover, they can have a couple more nights without cover, and then are properly hardened off and ready to go in the ground.

It's also a good idea to give cold-weather transplants a little extra compost or a fish/seaweed emulsion watering at transplant time. It is hard for plant roots to uptake nutrients in cool weather and this will aid their transition as well.

Garlic Ritual

Planting garlic in Vermont is a great way to extend the gardening season and gives you a crop that is perfect in so many dishes, stores well all winter long and even generates its own seed. It is a perfect way to tune into the cycles of the gardening season and feel like you are growing an important part of your diet. Garlic is expensive to purchase so there are savings to be had with your own garlic crop. Please follow this guide for easy, step-by-step instructions that will give you a garlic patch for life. I have been growing out my own garlic for 18 years and usually do not need to ever buy seed stock or garlic in the grocery store. The pleasures of garlic growing are abundant and I encourage you to get familiar with this wonderful and simple crop.

When to start the cycle?

Planting dates in Vermont are anytime between mid October and late October. It is best to wait until then, because if you plant too early, the bulbs will break out of dormancy too soon and this weakens the plant going into our harsh winters. If you plant the cloves during those last two weeks of October, it gives them just the right amount of time to take root and hunker down until spring, but not send out any top growth.

To plant garlic, you need to follow a few easy steps.

1. Bed preparation.

This is the act of making your garden soil ready for garlic planting. You want a nice patch of garden, that is worked deeply so that the soil is loose about a foot down in depth. If your garden is very compacted and hard, the garlic will not be able to grow well and you will be sure to end up with small heads of garlic that are tedious to peel and not all that satisfying. You can prepare the bed with a 3 prong fork by digging in straight down, tilting the handle of the fork back and forth, and loosening the hard pan. This is a good work out! Don’t hesitate to get dirty here by kneeling in the earth and breaking up the clods of soil with your hands so they are not chunky at all. Add a bit of well rotted manure or compost at this time. Not too much. For a 5 by 10 bed, maybe a 5 gallon bucket’s worth. You don’t want to over feed the garlic roots in the fall, but a little compost will add organic matter and that will help the structure of the soil, keeping it loose, able to retain some moisture without staying too wet.

Take your time and your garden will reward you. I always look at garlic planting as a soulful moment in the gardening cycle. It is saying goodbye to summer and embracing the dormancy of winter, when seeds deep below the surface slowly get ready for their spring emergence. Living in a climate with such long winters, I need these small, but important, rituals to remind me that spring will come and the cold barren winter is a necessary part of it all. The seed garlic is planted in the fall because it needs to send roots far into the earth in order to feed itself the following year. I take this as a metaphor for my own winter activities that feed me all year long - catching up on sleep, feeding my mind with more reading time, eating great, nourishing foods, and spending more time with friends and family.  I digress here, but these are the thoughts I have as I plant garlic, and after many years of doing it, I find that it is a necessary part of my mental preparation for winter.

2. Mark the rows with a hoe, or hand tool. I usually keep the rows about 12 inches apart and since my beds are about 4 feet wide, I keep 3 rows per bed and can easily reach the center. Just drag your tool - the sharp tip of a hoe or the narrow edge of a hard rake works well - through the soil to delineate the rows. You can use string and stakes if it is important to be straight, but I don’t bother with that at all.

3. Break up the garlic heads into individual cloves. Do not peel! And notice that one end is the root end and one end is the stem end. This will be important for planting right side up with the root end pointing straight down and the stem end pointing straight up.

4. Space out the cloves. Lay the cloves on the top of the soil, following the line you have just drawn in the soil.  Allow about 6 inches between all the cloves.

5. Planting, spacing, and yields

Now you can start to plant. I always kneel down and take my time to feel the earth under me at this point. It just feels good and is a way to say goodbye to the garden before winter! Then, take a bulb planting tool, or a sturdy,  sharp pointed stick, or your hand if your soil is soft and pliable, and poke a hole about 4 to 6 inches down. Shove the clove of garlic deep down, root end down, and cover up with the soil. Continue down the row and repeat until all is planted. Three  heads of garlic will turn into about 24 heads next spring - assuming your garlic has about 8 cloves per head. . And with 6” by 12” spacing, a 5’ x 10’ patch of garlic will yield about 60 heads of garlic. That is enough to enjoy one head of garlic per week, all year long, and still have some left over for planting. To plant a patch this big, you will need to plant the equivalent of 7 to 10 heads of garlic.

6. Compost and mulch. I usually add another 4” of compost or well rotted horse manure to the bed. I then leave it like that for about 6 weeks. Then in mid to late December, I cover the bed with a thick layer of straw. You can also use leaves here, but straw is the best insulator with hollow stems that trap air and keep everybody warm down below. Another advantage of straw is that it usually does not have weed seeds in it; mulch hay, straw’s poor cousin,  should be avoided since it is laden with all sorts of perennial grass and weed seeds. The straw moderates the winter soil temperature and prevents buckling and heaving which could push those garlic cloves up and out of the ground.

Let winter pass you by now, and next......

7. Spring time chores with garlic. Once the snow melts and the soil warms up a bit, your garlic will break dormancy and magically pop up out of the earth. It is important to pull back the straw to let the garlic see sunlight. If you wait a bit too long, and pull back the straw only to see a bunch of yellowing stems, don’t worry! The garlic shoots will green up in no time and will look fabulously sturdy after a week or so of direct sunlight. I usually pull the straw into the garden path, let it pile up there and then replace it around the growing garlic to block out weeds once the garlic plants are about 8 inches high. I often will add a little granular fertilizer at this time, before putting the mulch back in place. For a 5 by 10 garlic patch about 3 cups of Pro-Gro from North Country organics or one bag of Compost Plus from Vermont Compost Company is just about right. This will insure you get large, easy to peel cloves that taste great.

8. Garlic scapes will appear on stiff neck garlic around late May. These look like green curly cues with a pointy end that gracefully swoops down and around, waving in the breeze. This is the budding and flowering portion of the garlic plant. It should be removed to help the plant spend its energy on sizing up the goods below ground. If it is allowed to flower, the plants’ strength will go towards the flower and the garlic forming below ground will be the weaker for it. The good news here is that the “scapes” as they are called, are good to eat. I usually cut off the pointy tip - it is rubbery and inedible, and then slice up the round stem and use it in stir fries, stews, pasta dishes, or pickles. When cooked, it has the texture of a nice green bean and the flavor of mild garlic. It is absolutely delicious and a once a year treat that marks the beginning of summer - a harbinger of good things to come.

9. When to harvest? Garlic is ready to harvest when about 70% of its leaves have turned yellow. This is somewhat subjective, and should be taken as not a hard and fast rule, but rather a guide. You can dig up one head of garlic and look for signs of well formed skin, plump cloves, and individuation (cloves that are individually formed, and not one big mass). This is usually some time in late July. In very wet and rainy years, sometimes it makes more sense to take the garlic our of the ground a little early so that the skin does not rot in the damp earth.

10. How to harvest? Take out your three prong fork again and use it to loosen the soil around the outside edges of each garlic row. This will break up the soil enough to allow you to pull out each plant with a firm yank. (If the stems break off, it is likely you waited too long and the skin and stems are starting to rot. At that point, just dig up the cloves with a spade and they will be okay in taste; they just won’t store well. ) Lay the plants on the surface of the soil so that they start to dry off. Once all the garlic is pulled up, wipe it with a towel or rag, and get ready to tie it into bundles. I usually take about 8 plants, hold them together in one hand, and with the other hand, wrap twine around the whole bundle. Tie off the twine and then hang the bundle in a dark airy space. The rafters of a garage, shed or barn work well. If you don’t have that type of space, just find a place out of the rain, out of direct sunlight and with good air circulation - a covered porch? a dry basement with a fan running? a spare bedroom that can get a little dirty? (no shag rugs please!).

11. Curing the garlic Curing is the process of letting the garlic dry which makes the papery skin that allows the garlic to keep all winter. The stems will turn brown and brittle and the exterior of the bulbs will become dry and paper-like, just like garlic in the store. At this point, it is okay to cut off those dry stems, wipe off any remaining dirt, cut off the roots, and place your garlic in a crate to store it. This can be done anytime from 3 to 6 weeks after you initially hang up the garlic to dry.

12. Storing the garlic Once the garlic is cured, cleaned and trimmed, you are ready to store it for eating all winter long. Garlic is best stored in the dark. In an airy, dry, cool place. I use milk crates, covered with a piece of burlap, and keep the crate in a very cool part of the basement. Ideal garlic storing temperatures are between 35 and 45 degrees, but a refrigerator is too humid, so please don’t be tempted to use that as a storage method. Other good places to store garlic (and onions for that matter) are unheated attics, attached garages that don’t freeze, but are not heated, or 3 season porches that do not freeze. Root cellars are great, but most of us don’t have one. If well stored, garlic will last until April or May - almost right in time for the garlic scape harvest!

13. Finding seed stock.

Until you build up your own supplies, you will have to purchase seed garlic. There are many great resources for garlic and for finding garlic seed, I recommend Johnny’s Selected Seeds, or locally, Last Resort Farm in Monkton, Hudak Farm in Saint Albans, or any farmer at your local farmers market who has nice looking seed stock. Seed stock is basically sorted out of the garlic harvest and selected for the following the following traits:

• • • good size
    • evenly formed cloves
    • strong stem
    • well formed skin
    • great flavor
    • ability to store for a long time

If you have been growing out your garlic in your garden, you can pick out the best cloves at cleaning and storing time. Set these aside in a safe place where they will not be eaten and come October, experience the joy of planting your own seed garlic.

14. Plant garlic. Repeat Step 1. above and the cycle starts all over again!

Mini Raised Bed Greenhouses for Sale

Look at these great greenhouses Eric Denice has built. We are offering four of them for sale this spring.  And can deliver them to you, too. We have used the same materials that go into our production greenhouses...6 mil plastic, hoops bent at just the right angle to shed water and snow, polycarbonate end walls, wiggle wire and extruded metal track for securing the plastic closed, and pipes that act as a "brake" for keeping the sides just where you want them. We are happy to give you a demo....or come and peek at ours that is all planted and growing along nicely.

You can roll up the sides, you can close it securely and easily, or even take the plastic all the way off once the weather warms up. The frame can act as part of a trellis system for tomatoes giving them a warm and dry environment as they size up, and then you can take the plastic all the way off and let them grow through the top of the frame. Just add a few horizontal lines of twine and, voila, instant tomato trellis!

Plants are nicely tucked in and cozy warm, no matter what the weather! You can easily get a 2 to 3 week jump on the season with this kind of season extension. The raised bed means that the soil is dry and warm long before garden beds, and the tight, plastic cover gives you warmth on cold nights. You can keep the sides rolled down on chilly, cloudy days, but it is best to roll them up a bit in the morning. It can get quite warm in there when the sun pops out. This type of greenhouse will allow you to harvest greens almost year round. It can also be used as a spot to start seeds, harden off plants, and gives you an extra zone of warmth if you would like to grow a perennial that is not usually hardy here.

We can deliver, bring you soil, plants, and have your instant garden ready in just an hour or so! Just add water.

Dimensions: 4' by 10' 

Base boards are made of 2" by 10" hemlock

Price $425

Garden Chores this Weekend

The time to get things done in the garden is shrinking. My good intentions are to get lots done this weekend. Here is what I have lined up for this weekend in the garden: Fill the new raised beds that I just put in the back yard.

Get soil ready for garlic planting.

Finish planting shrubs along the fence line between our yard and our neighbors' new barn. I am planting Ilex verticulata, or winterberry. The bright red berries are a nice contrast against the wooden building and will bring lots of birds to the yard.

Add compost to some new flower beds for next year.

Turn the compost pile.

What do you have planned?

Frost Dates in Vermont - South Hero is the Winner!

Here is a great chart that analyses all the temperature data collected in Vermont over the years and gives us the probability of dates for first and last frosts around the state. South Hero and the lake Champlain Islands have Vermont's longest growing season (measured by number of frost-free days according to N.O.A.A).  Take a look and prepare your garden for those first frosty nights. Here is what I do at my house to prepare for those first frosts:

If it is a really early frost, (September in Hinesburg), I will harvest all the ripe fruit on the heat loving plants (squashes, tomatoes, peppers, eggplant, etc) and if the plants still look healthy and have lots of unripe fruit, I will cover the plants with row cover. You can use sheets, blankets, plastic sheeting, etc. If the frost is coming at a later point, I often won't bother with the plant protection - just harvest all the fruit (green tomatoes can ripen indoors) and call it a day!

I don't bother to protect lettuce unless the first frost is very cold and very early. Lettuce can handle a few light frosts, so it is usually not a problem early on. Later in the season, I set up some simple wire hoops and keep the lettuce under row cover for the remainder of the season. This allows fresh lettuce to be harvested for salads well into November. It is good idea to seed or plant fresh lettuce in late summer and early fall so that the protected plantings of fall are fresh and tender. It is not really worth it, from a culinary perspective, to keep old or bitter lettuce alive. Plus it won't do as well if it is past its prime and won't fend off the cold like a younger planting can.

Hardy greens like kale, mustard greens, collards, etc do not need row cover and can live, unprotected, into December. You can always put some sort of protection over them in November to increase the harvest period past December, but it can be difficult to do with the taller plants. The wind dessicates them and makes them unappealing, and without a larger structure like a cold frame or mini-greenhosue, it can be difficult to give them adequate shelter.

All these attempts at fall crop protection will leave you grateful for the sweet rewards of fresh salads, tomatoes coming out of the cellar ripened and tasty, and nutritious leafy greens sweetened by the kiss of cold.

The Overwintered Garden

“Overwintered” is a term used to describe a vegetable that is planted in the spring, summer or fall of one year in order to be eaten in the spring of the following year. This is a great way to extend the growing and eating season in our Vermont climate. Overwintered crops generally are dormant all winter long and then come back to life with the lengthening days and warming temperatures of spring.

Overwintered Spinach - Not all vegetables can survive our VT winters, but the few that can include spinach, parsnips, leeks, garlic, and parsley. Spinach for early spring eating (mid to late April) should be sown in the first two weeks of September. Once it germinates, allow it to grow without harvesting or touching it. You can eat a little if you want, but ideally you will leave as much of the plant in the ground as possible. Once very cold weather hits, in early to mid-December, you can protect the spinach under a layer of straw, or leaves, or a few layers of thick row cover (Reemay or Agribon can be found at Gardeners’ Supply Company or ordered online at Johnny’s Selected Seeds). In the early spring, as soon as the ground has thawed out, remove the layers of protection and you will see the spinach slowly coming to life, long before any other plants begin to stir. It won’t look like much at first, but will quickly grow to be the size of spinach planted during normal times. It will be extra sweet from having survived the cold and will be incredibly rewarding - a truly vibrant food. This is such a delicious treat for early spring and really worth the trouble.

Overwintered Parsnips- parsnips are a long season crop. They are best when planted in very early spring and harvest the following year. This allows them to grow to a good size and then sweeten up with the cold temperatures. Plant the strange looking seeds in shallow trenches, ¼ inch deep (that is NOT very deep!). Keep well watered and well weeded all summer long. In the fall, you can harvest a few of the larger parsnips to eat September through December, but be sure to elave a few for spring time meals. Once the ground is frozen, in later December, mulch heavily with a layer of straw. The straw moderates the soil temperatures and prevents the soil from buckling and heaving with the freeze and thaw cycles. Pull off all of the mulch as soon as the ground thaws, and then in late April and early May, you can dig up huge, sweet roots that are a lovely addition to spring time soups, roasted vegetable dishes and purees.

Leeks are another crop that is planted very early in spring - mid to late April is ideal. The small and slender plants are planted in trenches, about 6 to 8 inches apart in rows that are 12 inches apart. Keep leeks well watered and weeded. Once they are about 10” tall, you can fertilize them with a good organic fertilizer such as Pro Gro from North Country Organics or Compost Plus from Vermont Compost Company. Then hill up the plants with soil from in between the rows. A good hoe makes this job much easier. The more you hill, the larger the plants will be. This allows for more of the white, edible portion to grow. Hilling also helps to keep the moisture even, another condition which encourages bigger growth. You can hill leeks one more time before fall, in early August or so if you choose to. If you cannot eat all of your leeks in the fall, leave a few in the garden for overwintering. Mulch well with straw (about 6” in depth) and let sit in the garden all winter long. On warmer winter days, you may be able to still harvest some of the leeks if the ground has not frozen solid under the mulch. With whatever leeks are left in the ground come snow melt, pull off the mulch and wait to see what happens. Not all leeks will have successfully lived through the winer, but about 40 to 60% should if you have followed these steps. You will see some yellow and rotting foliage with fresh green growth poking through. These are the leeks that have made it through winter. Let them size up a bit before harvesting. They will come back to life and can be picked and eaten in later April or mid-May. You will have to peel back some of the outer layers, but underneath will be a luscious, silky treat. So sweet in spring, and a great addition to soups, vegetable tarts, or braised meats.

Other crops: I have had good luck with late seedings of lettuce, scallions, cilantro and dill. These all overwintered fine and were good for a few salads in very early spring before they decided to go to seed. The lettuce varieties that I have found to be most well adapted to overwintering are Merveilles des Quatres Saisons, a beautiful French heirloom variety,  and Tango, a green oakleaf. You can also plant shallots and garlic in fall for early harvests. Green garlic is an immature head of garlic that tastes milder than its full grown version.  Parsley is a biennial and will also come back to life in the spring before it goes to seed. Biennials make a flower in their second year, so this is normal plant behavior! Remember, every winter is different. This type of growing requires flexibility, observation, and a willingness to experiment. Exact planting and harvest dates are not easily determined because they are a function of weather, where you garden is sited, and micro climates. The best way to understand overwintering is to start doing it, and see what works well for you. Observe each crops natural life cycle, and learn to work with it in the context of our long and cold winters. There is no better way to say “Hello, Spring!” than by harvesting your first salads in April when green life is just beginning to stir.

Fall Planting Guide

Mid-August is rolling around, and with it comes some vegetable planting possibilities that will feed you late into autumn and early winter. This is a great time to clean out some of the garden beds that have finished producing and replant them with some fresh crops for late season harvest. Here are a few options that you might want to consider incorporating into your later summer gardening routine.

A note on flea beetles and row cover. Flea beetles are little, black and jump around on your plants while making tiny little holes. They love anything in the brassica family - cabbage,broccoli, arugual, mustards, collards, etc. Row cover is a white fabric used to keep out insects and/or to warm up the soil and air around the plants. It does not hurt to use row cover to speed things along and to keep out the flea beetles. Broccoli - seed a small amount directly into garden beds, or buy transplants up to mid-August. If you are direct seeding into a garden bed, remember to thin or prick out and replant the broccoli babies so that they have proper spacing (15” or so). Cabbage - same as broccoli. Choose shorter day varieties. Seed packets usually list the days to maturity for all crops. In early August, you can usually get away with planting a 60 day cabbage that will be ready in early October. Kale - this is a great time to put in a few more kale plants or seeds, they will size up before snow flies, and will withstand lots of wintery weather. The good thing about kale, is that once it is full grown, it will just stand around in the garden waiting to be picked. It does not get “too old” or bolt (jump into seed production mode). This makes it a great early winter crop and a joy to harvest under snow fall. Collards can be treated this way as well. Arugula - a nice addition to salads, this tender green with a mustard-like flavor is also a great survivor of cold temperatures. It can withstand many hard frosts and will continue to add a little spike to your salads well into November and December. You can put row cover on it to keep away the flea beetles and to give it a little extra protection from cold winds that can dry it out. If it starts to turn a little purple in the colder temps, don’t worry about it, it is still fine to eat. This is just a symptom of not being able to absorb phosphorous in cold conditions. Turnips - a short season salad turnip can still be sown in August. I like the Hakurei variety from Johnny’s. It is delicious raw in salads, sliced thinly or finely diced, or sauteed in a little butter with fresh herbs (winter savory makes a special appearance at my house, often in this dish in particular). People who think they hate turnips will just be shocked when they taste these buttery slices that just melt in your mouth. Spinach - in the first half of August, it is a good idea to plant a large patch of spinach. It will germinate in the cooler night time temperatures (spinach does not like to germinate in the heat) and will last a long time in the field in the cool temperatures of October and early November. Carrots - fall carrots are best seeded right around July 4th. This gives you a chance to do an early batch of carrots for late spring, early summer eating, and then a second (or third) batch for fall eating. Fall carrots are considerable sweeter than spring seeded carrots and are definitely worth the trouble. Boc Choi - this is another crop that does really well in the cooler temperatures of fall. It is not a heat lover, and therefore should only be planted in April and May and then again in mid to late August for fall harvest. This benefits from row cover if you have a lot of flea beetle pressure. There are quite a few different versions of boc choi, and if you like the crunchy texture and delicate flavor of this crucifer, then please consider trying baby boc choi, red boc choi, or full sized boc choi. While it is easier to start with plants, it is certainly possible to direct seed this crop. Beets - fall time beets are sweet, tender, and do not have that “dirt” taste of beets grown in full summer heat. Last planting date for fall beets is around August 10th. They should be direct seeded in the garden and then thinned to one plant per 2 to 3 inches. You can space the rows 10 to 12 inches apart and fit about 3 rows in an average bed with a 4 ft width. The greens are tasty too, and the little delicate plants you pull out when thinning are a great addition to sauteed greens, soups, or even salads if very young.

Cilantro and Dill - these herbs can be planted directly in the garden from seed as late as mid-August. They grow well in the cold, and actually prefer it. The cold slows them down and prevents them from going to seed. Plant a good sized patch since you can harvest the plants well into December. They can take a frost, a snow fall and still will bounce right back.

Mustard Greens - these can be planted just like arugula. See instructions above.

Radishes - are a great addition to the late season garden. They can be planted right up to early September, and will maintain a high level of quality right up until it snows.

Lettuce - you can direct seed certain varieties of lettuce for fall harvest. Some do better than others in the cold. I like to plant Merveilles des Quatres Saisons and Tango for their beauty, taste, and cold hardiness.

Parsley - this herb can take very cold temperatures, so make sure, in mid-July or so that you have a nice patch of this going into fall and later summer. If this is an herb that you use frequently, it does not hurt to plant two or three different patches over the course of later April to mid - July. It is a slow grower, so after mid-July you can only plant it from transplants, not seed.

Things to Plant Now. You Will be Glad You Did.

August is rolling around, thundering ahead,  and with it comes some vegetable planting possibilities that will feed you late into autumn and early winter. This is a great time to clean out some of the garden beds that have finished producing and replant them with some fresh crops for late season harvest. Here are a few options that you might want to consider incorporating into your later summer gardening routine.

Broccoli

- seed a small amount directly into garden beds, or buy transplants up to mid-August. If you are direct seeding into a garden bed, remember to thin or prick out and replant the broccoli babies so that they have proper spacing (15” or so).

Cabbage

- same as broccoli. Choose shorter day varieties. Seed packets usually list the days to maturity for all crops. In early August, you can usually get away with planting a 60 day cabbage that will be ready in early October.

Kale -

this is a great time to put in a few more kale plants or seeds, they will size up before snow flies, and will withstand lots of wintery weather. The good thing about kale, is that once it is full grown, it will just stand around in the garden waiting to be picked. It does not get “too old” or bolt (jump into seed production mode). This makes it a great early winter crop and a joy to harvest under snow fall. Collards can be treated this way as well. A note on flea beetles: It does not hurt to use row cover to speed things along and to keep out the flea beetles. They are little biting insects that make little holes in the leaves and generally slow down a plant’s growth by stressing it a bit. All vegetables in the brassica family are susceptible to flea beetles - broccoli, kale, cabbage, mustards, arugula, collard greens, and boc choi are all in this family.

Arugula -

a nice addition to salads, this tender green with a mustard-like flavor is also a great survivor of cold temperatures. It can withstand many hard frosts and will continue to add a little spike to your salads well into November and December. You can put row cover on it to keep away the flea beetles and to give it a little extra protection from cold winds that can dry it out. If it starts to turn a little purple in the colder temps, don’t worry about it, it is still fine to eat. This is just a symptom of not being able to absorb phosphorous in cold conditions.

Turnips

- a short season salad turnip can still be sown in August. I like the Hakurei variety from Johnny’s. It is delicious raw in salads, sliced thinly or finely diced, or sauteed in a little butter with fresh herbs (winter savory makes a special appearance at my house, often in this dish in particular). People who think they hate turnips will just be shocked when they taste these buttery slices that just melt in your mouth.

Spinach

- in the first half of August, it is a good idea to plant a large patch of spinach. It will germinate in the cooler night time temperatures (spinach does not like to germinate in the heat) and will last a long time in the field in the cool temperatures of October and early November.

Overwintered Spinach - overwintering means keeping a vegetable alive through the winter for spring harvesting and eating. Not all vegetables can survive our VT winters, but the few that can include spinach, parsnips, leeks, garlic, and parsley. Spinach for early spring eating (mid to late April) should be sown in the first two weeks of September. Once it germinates, allow it to grow without harvesting or touching it. You can eat a little if you want, but ideally you will leave as much of the plant in the ground as possible. Once very cold weather hits, in early to mid-December, you can protect the spinach under a layer of straw, or leaves, or a few layers of row cover. In the spring, as soon as the ground has thawed out, remove the layers of protection and you will see the spinach come to life, long before any other plants begin to stir. This is such a delicious treat for early spring and really worth the trouble. A future post will be just about overwintered vegetables, so if this is something you have been wanting to try in your garden, check back here in a few days!

Cilantro and Dill

are good herbs for fall planting since their cold-hardiness is unmatched, and it will give you something to add to autumn salsas, salads, and pickles. Just sprinkle some seed into a shallow trench, press them in, and lightly cover with soil. The planting depth is very shallow here, just 1/4 inch or so. One of the most common problems with crops seeded directly into garden soil, is that they get planted too deeply. Remember this basic rule of thumb: the seed needs to be planted only 2 times deeper than its own size. Cilantro and dill will live until the first snow! They thrive in the cold. They are true soldiers of season extension.

Let us know if you feel inspired to try your hand with some of this season extension - we love to hear about it!

Spring Time and Season Extension

We are busy happily working in the greenhouses! Early spring is an active time for seed planting. Some vegetables need to be planted in  a greenhouse and nurtured along as the Vermont summer is just not long enough for them to be planted directly in the garden. The germination of the earliest vegetables is a thrill to us and we know that they will thrill you in your gardens. With a few simple strategies for season extension, Spring can  be a rewarding time to see a few early flowers and even to grow some cold tolerant greens. Containers are a great way to do this. They can be kept indoors on the coldest days and nights, covered up with row covers, blankets or plastic sheeting on the mildly cold nights, and left out all day and night once the weather permits. Any crate, or large pot with holes in the bottom can be filled with good quality potting soil such as Vermont Compost Company?s “Fort V” and then planted with an array of salad greens and edible blossoms such as pansies that you can cut from once they reach a few inches high. You can cut and harvest these plants and allow them to re-grow for multiple harvests, allowing you a gorgeous salad while it is still too cold to be out in the garden.

As soon as the soil can be worked in your garden, it is possible to get a jump on our seemingly late warm weather by building a simple shelter out of Number 9 gauge wire and some row cover or even old blankets and plastic sheeting. If you cut the wire into 6 foot lengths, plant each end into the ground (making a hoop) and repeat every few feet, you now have a very quick and easy tunnel frame upon which to drape your fabric. This creates a lovely shelter for some very hardy greens. With this type of simple tunnel, a version of a cold frame, it is most important to cover it at night and uncover it in the morning. The plants can get very hot unless you use special row cover designed to stay on night and day.

The most cold tolerant food crops we can grow here are things like kale, spinach, collards, arugula, mustard greens, mache (corn salad), and many herbs such as cilantro, dill, sorrel, and chives. Certain lettuces are very cold hardy, but they cannot take the frost quite as well as the plants mentioned above--good cold hardy varieties include the French heirlooms, “Reines des Glaces” and “Merveiles des Quatres Saisons.” These most tender and delicate looking lettuces can take quite a beating when it comes to cold weather. Overall, early spring is a great time to satisfy the need for green, fresh foods that are grown locally after a long winer of leafy foods trucked in from far away. The difference in taste and the level of satisfaction you will experience is well worth the effort.

Don't Fear Frost! Extending Your Growing Season

Here in Vermont, we can count on just a few frost-free months. But with a little bit of planning, strategic planting, and getting the right tools, you can harvest through a bit of frost and snow. But by planning out crop planting so that crops are mature before the short days and cold weather hits, you can then protect them and harvest them well into winter.

Row covers such as reemay are usually used with hoops made of #9 gauge wire so that the fabric does not rest right on the plants. These covers breath and come in various weights. They allow light and water in, but raise the temperature of the soil and air inside the cover.

Cold frames are simple boxes that are filled with good quality soil and are covered with windows (called "lights") or clear plexiglass or sometimes plastic. They are used for season extension, plant protection, as mini-greenhouses, and as a place to overwinter tender perennials. The covers are closed at night and opened on sunny days. Lettuce, spinach, hardy greens, and herbs can be grown most of the winter in a hot bed with a south facing light. "Hot beds" are deep cold frames that hold a thick layer of manure below the soil. As the manure decomposes, it lets out a tremendous amount of heat which keeps the frame very warm at night even in the winter. Cold frames can be made out of wood, straw, stone, concrete with old storm windows on hinges. The windows must be small enough that they can be opened and closed easily by raising them up and propping them with a stick.

Straw mulch is a great way to extend the season for vegetables such as kale, spinach, carrots, beets and other root crops. Once the crops are matured, a very thick layer of straw around the base of the plants will keep the ground from freezing so that the roots may still be harvested. The straw also keeps the top of the crops from freezing in extreme temperatures. Spinach can be overwintered under straw so that an early spring crop can be eaten. Kale lasts well into winter and is also helped by a deep straw layer so that the cold wind does not completely dessicate the leaves.

Every home garden has microclimates. It is a good idea to take advantage of these when planning the fall garden. A south-facing foundation wall is a great place to prep a small area for greens and herbs that will be well sheltered from cold, northern winds. It's a good place to situate a cold frame as well and to plant it with radishes, greens, and other crops that will benefit from the micro climate.

Containers are another great way to extend the season. Herbs, greens and lettuces can be planted in pots, apple crates, milk crates, or window boxes and moved inside when the weather gets too cold. While they might not last all winter long, they will certainly give you some fresh eating for a few months longer...all you need is a sunny spot or some simple grow lights. Thyme, parsley, rosemary, and sage all do well in containers in the home and will last all winter. Kale and lettuce will last up to 5 or 6 weeks longer than they would outdoors.

Photograph by One Green Generation . Creative Commons license.