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Winter Gardening: Eliot Coleman

Grow food in winter without heated greenhouses

by Ian Aldrich

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Credit: John Burgoyne

Credit: John Burgoyne

Credit: John Burgoyne

Credit: John Burgoyne

Credit: John Burgoyne

Credit: John Burgoyne

Credit: John Burgoyne

For more than 30 years, Eliot Coleman of Harborside, Maine, has successfully grown food in winter without heated greenhouses. Think outside your zone. Each winter, his gardens head south, to Georgia, without moving an inch.

How? For every layer of protection--a cold frame, for example--the growing environment shifts 500 miles. By doubling up, says Coleman, winter farmers never have to contend with frozen soil, not even when the mercury drops well below zero. "You might get a little surface freezing, but by 10 a.m. it will be unfrozen," he says. "The minute the sun comes out, all of a sudden it's 50 degrees in there. We've never had a day when we couldn't put seeds in the greenhouse beds."

For more on winter gardening, go to: Four Season Farm

Hoop Houses

Coleman says you can find simple, inexpensive options out there to protect your plants. If you're already using a cold frame, he recommends getting six unused 2x4s and building an A-frame around the structure, then wrapping the new enclosure in greenhouse plastic.

No cold frame? No problem. Coleman is also a big fan of "hoop houses," small enclosures made from semicircle-shaped strips of metal or plastic piping covered in plastic. "I've been doing this a long time, and I'm still like a little kid when I go in there and see what's happening," he says. "It's amazing that it just works."

Begin in August

Coleman's winter planting begins in early August and extends through mid-September, a period he likes to refer to as a "second spring." "You have to get the plants established while the growing season still has something left to it," he says.

Spinach for Winter

For all would-be winter gardeners, Coleman suggests going with spinach, which can be harvested four times, growing well into February. "It keeps renewing itself," he says.

No Weeds, No Watering

Unlike summer warmth, colder temperatures mean that pests and even weeds are nearly eliminated. Even better: Between November and February, says Coleman, gardeners don't have to water their plants. "The water table is higher," he says, "and because the sun is so low, there isn't much evaporation."

Baby Lettuce is Better

It's true, says Coleman: Small really is better when it comes to winter gardening. Baby leaf greens are not only hardier, they're tastier. "A full-size lettuce will freeze two or three times and turn to mush," he says. "A three-inch-tall baby lettuce leaf will freeze and thaw all winter long and recover each day."

Salad Every Night

Newbie winter gardeners can do just fine--and eat really well, too--with a simple 5-by-10-foot planting space. "With baby greens, if you plant them right--and you can put rows as close as two inches apart--you can have a salad every night all winter long."