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DSC00723 Lettuce Frost Hard Freeze
Chilly 2012 Winter Solstice morning, Pilgrim Terrace Community Garden, Santa Barbara CA

Cold season things to know about your veggies!

  • Fertilize.  Healthy plants can withstand more cold. But. From August on, if you anticipate a cold winter, avoid applying fertilizer with Nitrogen, apply at half your summer rate, until after the last frost, to prevent a flush of tender growth that can be damaged by the cold.
  • Cool season crops, such as broccoli, cabbage, peas, and onions, originated in northern areas, and can tolerate frost and light freezes of short durations with little damage, plant cold hardy varieties. But other tender morsels often die literal black deaths from killing freezes. Lettuces, marigolds, your fragrant basil, and peppers are usually the first to go.
  • Better taste!  Cool-season vegetables, such as carrots, broccoli, cauliflower, and Brussels sprouts, produce their best flavor when they mature during cool weather. They react to cold conditions and frost by producing sugars, making them taste sweet, especially Brussels sprouts and kale, but also parsnips and leeks! Ask the folks at the farmer’s market stands if their farms have gotten a frost yet – farms in the country often get frost long before the cities.
  • When there are several days at low temps, cole crops (cabbage, broccoli, and cauliflower) and onion sets, produce a seed stalk, called bolting. Unless you want to save seeds, at that point, harvest good leaves for greens, give the remaining plant to your compost.
  • Early spring planting! I’ve often said, ‘Who can resist early planting?!’ Cold spells do come after last average freeze dates. Most of our plants will be fine, but some plants are really sensitive. Bell peppers don’t like cold. If you have them as transplants, keep them inside for the duration. Many seeds may not germinate during this period. Water them sparingly so they don’t rot. Early planted Beans, Cucumbers and Zucchinis may not make it. Early variety tomatoes should be fine. If your lettuce gets frosty, not to worry. They amazingly usually make it ok. Good luck to you and your planties!

Frost we understand, but what’s a Hard Freeze?! When temperatures drop below 32° Fahrenheit (0° Centigrade) and remain there for several hours, even only 2 hours will do it, typically killing seasonal vegetation. Several hours at 25 to 28 degrees, ice crystals form not only on your plant, but in your plant, damaging the cell walls. The coldest time of day is  just before daybreak. Clouds at night can absorb and reflect heat back to the earth. Wind can mix the ascending warm air with the descending cold air. Calm, clear nights pose the greatest danger of frost. WIND:  If it is windy, less worryCold air must settle to form frost and any wind will usually prevent this. Or, a wind may dry your plants, making them more susceptible to freezing!

Floating Row Cover, Winter Frost Blanket, over Tomato Cages – see how they are staked in place by the cages? One gardener calls these Plant Pajamas!

Frost or freeze survival….

Before!

  • Watch your weather forecast religiously! Weather has no mercy.
  • Water early in the dayWet soil insulates and protects roots. The water warms up during the day and releases heat slowly during the night. The upper part of a plant may die, but the roots may be strong enough to push up new growth!
  • Move frost tender plants under eaves, a spreading tree, into greenhouses, garage. Key word here is UNDER.
  • Haunt yard sales, the thrift shop, for old bed sheets, blankets, tablecloths, curtains, towels, shower curtains, burlap sacks, tarps – many end their lives covering garden plants for frost protection! Use newspaper with clothes pins so it won’t blow around. Plastic can be worse than nothing if it touches the plant. Prop up an unused trellis, get creative! Use those wire tomato cages to support your covers! Lay them down among short plants, stand them around taller plants. At home you can lay out a folding chaise lounge chair, or lawn chairs, and cover them!! Secure the edges with stakes, rocks, bricks, or cover with soil. You can use upside down plant pots only if they are large enough that the plants they will cover don’t touch the pot. Put a rock on top to keep them from blowing over! That’s called a hot-cap! The beauty of floating row covers (see image), also called frost or winter blankets, is they can be left in place during the day! Cover the plants mid- to late-afternoon if possible, before temperatures start to drop.
  • Set up windbreaks.
  • What you can’t cover, that is not frost hardy, harvest. Root crops such as carrots and radishes should be harvested or mulched heavily before a hard freeze.

After! 

  • If you didn’t cover, wash your plants off before the sun gets on them. Sometimes that will counteract the freeze burn.
  • If you did cover, take the covers off, before the sun hits the beds, so everybody can get their sun quotient for the day! Winter days are short!
  • Dry out your covers, keep them handy.
  • Damaged leaves appear dark green and water soaked at first, later becoming black. If your plant is totally gone, it’s compost, replace your plant. Except potatoes! They will resprout, give ‘em 10 to 14 days!
  • Should you trim the ugly damaged stuff off and give your plant a lot of fertilizer to help it? Whoa, Nelly! That’s a NO! The damaged part is protecting the now undamaged part. If you trim and add a lot of fertilizer, tender new growth will form, and that will be toast if there is another frost or freeze. Wait to trim until no more frost is predicted, feed lightly.

Was that groaning, whining I heard? Stop it. Just go out there and cover your plants, no fooling around, you hear?! You will be glad you did, it’s your plants’ lives you are saving! Besides, reviving is harder than covering, and regrowing takes all that time all over again. Also, many will be well past the window for replanting, so cover, cover, cover! Better to have a yard full of ghosts (sheet covers) and look silly, than lose your plants.

Repeat, Religion! Watch WEATHER reports in case of freezes, heavy winds, rain. Santa Barbara’s average First Frost (fall) date AT THE AIRPORT is December 19, Last Frost (spring) date is (was?) January 22. That can vary from the coastal areas to the foothills, and our climate is changing generally to warmer, so these dates may not be viable guides much longer, if even now….

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Updated 12.16.15


The Green Bean Connection newsletter started as correspondence for the Santa Barbara CA USA, Pilgrim Terrace Community Garden. All three of Santa Barbara city community gardens are very coastal. During late spring/summer we are in a fog belt/marine layer area most years, locally referred to as the May grays, June glooms and August fogusts. Keep that in mind compared to the microclimate niche where your veggie garden is. Bless you for being such a wonderful Earth Steward!

Love your Mother! Plant bird & bee food! Think grey water! Grow organic!

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First, let’s review the next months so you can plan ahead!

August  Depends on which you like most, summer crops or winter crops.  Plant more summer crops you can’t get enough of!  If you love winter crops, get a head start!  Improve your soil as plants finish, areas become available. Midmonth start cool season SEEDS – celery, Brassicas: cabbage, brocs, Brussels sprouts, collards, cauliflower, kales, are good – or wait until September, Labor Day Weekend is perfect!   Make notes about your summer crops in your garden journal.
September  First fall planting month, Labor Day weekend or bust!  Seeds are fun, transplants produce sooner.  Plant Sweet Peas for Christmas bloom!
October  Transplants of all fall crops, but specially of cabbages and artichokes.  Cut Strawberry runners off to chill for Nov planting.
November  Seeds of onions for slicing.  Wildflowers from seed (don’t let the bed dry out).  Strawberries in no later than Nov 5.  Transplants of winter veggies.
December is winter’s June!  Crops are starting to come in, it’s maintenance time!

Eight Fun August Garden Projects!

  1. Save your very best summer seeds
  2. Re/design your fall garden layout, checking your garden notes from last winter
  3. Get seeds for winter planting
  4. Build raised beds with wire protection to prevent gopher losses
  5. Prepare your soil – add manures, compost, appropriate amendments
  6. Remove funky garden debris, compost healthy green waste
  7. Do greenhouse winter maintenance, build a greenhouse for winter production
  8. Make wonderful preserves, dehydrate, freeze, harvest seeds, make herbed oil & vinegar gifts, powdered herbs, pesto ‘ice’ cubes, dill pickles, candles, organic cosmetics!

Now through October is the special time to take stock of your accomplishments, jot journal entries of what worked well, didn’t, how much you want to plant next spring, reminders what you would like to do differently or try next year.  Enter a reminder on your calendar to review these notes, say next Feb/March, when you will be planning your 2011 summer garden, buying spring seeds, getting starts going in the greenhouse!

Plant more of faster growing summer crops you love, like beans – you will just have a shorter harvest time.  If you love winter crops, improve your soil as plants finish.  As areas become available, plant seeds midmonth, or wait until Labor Day weekend to plant!  If you don’t have enough room yet, establish a little nursery in an open area to plant celery, your Brassicas:  cabbage, brocs, Brussels sprouts, collards cauliflower, kales – to later  transplant into other garden areas, or spread apart, late September and October.  Or start in containers for later transplanting.  If you don’t have the time to tend them, simply get transplants at the nursery when you want them.  However, the beauty of planting from seed is you can get the varieties you want, you can experiment with new varieties!  A seed catalog is a lovely and dangerous thing.

Plant peas at the base of your dying beans.  When you take your beans out, clip them off, leaving the roots, with the Nitrogen nodules legumes make, in the soil!  At the end of August, plant lettuces in shadier spots behind plants that will protect them during the September heat, but who will soon be done, allowing your lettuces full sun when it is cooler later on.  Remember, September can be HOT.

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