When the polar vortex howls outside your door and the snow is deep enough to swallow a dog, gardening might seem like a summer fever dream. But winter sowing, an easy, no-fuss method to start seeds created by American gardener Trudi Greissle Davidoff, makes it possible to swing into spring a little early.
Winter sowing upcycles plastic containers like water jugs, salad clamshells, or pop bottles into mini greenhouses that allow seeds to germinate outside when the conditions are right. Whether you’re into flowers or veg, winter sowing can give you seedlings with so little effort even the most neglectful plant parent can manage.
Valerie, who asked that her last name not be used, is one of the moderators of a winter sowing Facebook group that teaches Davidoff’s method, sees huge benefits: “It's easy to do, not expensive, low maintenance, and you get great germination! You can do it in winter and have seedlings in spring without the hardening off [acclimatization] process and no expensive equipment.” Since it puts plants out in the elements, no precious indoor space needs to be sacrificed, and seedlings don’t need to be defended from toddlers or pets.
The first time Valerie tried winter sowing, her husband was skeptical and said she hoped she wouldn’t get too disappointed, but she was anything but: “I had more seedlings than I knew what to do with!”
Ready to give winter sowing a try? Valerie’s advice to first-timers is not to overcomplicate matters: “The method is simple and straightforward, and meant to be easy.”
Winter sowing season starts after the winter solstice on December 21. Native perennials (like milkweed or coneflower) often need 60 to 90 days of cold weather exposure, so they’re planted when there are many cold nights to come. You can sow all your seeds at once, though some gardeners wait until a couple months before their last frost date to sow tender annuals (think tomatoes or basil), as this helps avoid unseasonable temperature swings.
The easiest place to start winter sowing is with hardy annuals (e.g., plants that can survive a frost, like kale, peas or strawflowers). Seed packages will often say these can be planted out before the frost. Try leafy greens (kale, chard, lettuce, bok choy, spinach, etc.) and hardy herbs (cilantro, chives, or parsley). But people also winter sow beets, peas, pumpkins, grasses, snapdragons, coneflowers, and more: anything can be winter sown except tropical plants.
Winter sowing also doesn’t need to stop with cold weather, either: many people use this technique well into spring to get a head start on heat-loving crops like cucumbers or zinnias.
Keep in mind if you’re winter sowing perennials (plants that come back each year), they’ll be slower to grow and may not flower in their first year.
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