Cold Winter Areas

Zones: 1–7a

These zones experience cold winters with extended periods of freezing temperatures. In March, monitor soil conditions, thaw cycles, and late frosts as you prepare for early outdoor sowing. Indoors, this is a busy month for starting cool-season crops and hardy flowers under lights or in a greenhouse so they are ready to transplant as soon as the weather warms.

Indoors (fresh harvests):

  • Microgreens: peas, broccoli, sunflowers, arugula.
  • Sprouts: alfalfa, broccoli, radish, mung
  • Herbs & greens under lights: chives, parsley, mint

Crops to start indoors in good light: bunching onion, eggplant, tomato, pepper, zinnia, basil, Swiss chard, cosmos

Transplants to move outdoors (weather permitting - harden first): Onion, parsley, broccoli, cabbage, kohlrabi, arugula, pansy, viola

Crops that can be directly sown outdoors in March (assume intermittent frosts; a low tunnel or row cover makes most of these reliable): pak choi, cabbage, kale, mustard, fava bean, pea, turnip, parsnip, sweet pea

Cover crops: winter rye, fava bean, hairy vetch, red or white clover, and cover crop mixes.

Tip: This zone group covers a lot of territory. Nothing takes the place of talking with experienced gardeners in your area and, of course, watching the weather closely.

Use your USDA zone as a guide. Microclimates matter—coastal/urban spots run warmer; high elevation runs colder. 7b pockets can follow “Mild” recommendations with protection.

50 100 true //store.trueleafmarket.com/cdn/shop/t/54/assets/review-fallback.json?v=33078429469613971781712858278
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399 Items
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Melon Seeds - Vine Peachsmall size packet type seed packaging for - Melon Vine Peach
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Tomato Seeds - Slicing - Brandywine Black Potato Leafsmall size packet type seed packaging for - Tomato Slicing Brandywine Black Potato Leaf
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Tomato Seeds - Slicing - One Pound Pink Hybridmid size pouch type seed packaging for - Tomato Slicing One Pound Pink Hybrid
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Pepper Seeds - Hot - Thai OrnamentalPepper Seeds - Hot - Thai Ornamental
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Pepper Seeds - Hot - Thai Ornamental
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Parsley Seeds - Garden Blendsmall size packet type seed packaging for - Parsley Garden Blend
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Heirloom
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Melon Seeds - Schoon's Hardshell (Organic)small size packet type seed packaging for - Melon Schoons Hardshell Organic
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Heirloom
Organic
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Celosia Seeds - Plumed - Texas Plume Mixed (Organic)
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Organic
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Hyacinth Bulbs - Mixed
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Tomato Seeds - Slicing - Chef's Choice BiColor Hybrid AASsmall size packet type seed packaging for - Tomato Slicing Chefs Choice BiColor Hybrid AAS
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AAS Winner
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Daffodil Bulbs - Large Cupped 'Carlton'
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Pepper Seeds - Sweet - Nu Mex Sweetmid size pouch type seed packaging for - Zinnia Magellan Series Orange
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Grass Seeds - CloudGrass Seeds - Cloud
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Pepper Seeds - Hot - Fish (Organic)Pepper Seeds - Hot - Fish (Organic)
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Organic
Pepper Seeds - Hot - Fish (Organic)
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Tomato Seeds - Slicing - Sparksmid size pouch type seed packaging for - Tomato Slicing Sparks
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Hyacinth Bulbs - Blue Jacket
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Pumpkin Seeds - Autumn Moon and Ghoulie Mixmid size pouch type seed packaging for - Zinnia Magellan Series Orange
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Melon Seeds - Cantaloupe - Imperial PMR 45 (Organic)small size packet type seed packaging for - Melon Cantaloupe Imperial PMR 45 Organic
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Grass Seeds - QuakingTrue Leaf Market Flower Seed packaging Bag
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Melon Seeds - Eindorsmall size packet type seed packaging for - Melon Eindor
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Calendula Seeds - Pacific Beauty Mixture (Organic)
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Radish Seeds - Sakurajima Mammothmid size pouch type seed packaging for - Radish Sakurajima Mammoth
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Tomato Seeds - Slicing - Micado Violettersmall size packet type seed packaging for - Tomato Slicing Micado Violetter
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Pumpkin Seeds - Hooligan F1 PMTsmall size packet type seed packaging for - Pumpkin Hooligan F1 PMT
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Watermelon Seeds - Picnic - Moon & Stars Yellow Flesh...
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Daffodil Bulbs - Mixed
$19.99
Pumpkin Seeds - Baby Boo
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Seed Potatoes - Lamoka (Organic)
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Begonia Tubers - Bi-Color Picotee Mixture
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Dahlia Bulbs - Arabian Night
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Gladiolus Bulbs - Dazzling Tangerine Mixture
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Gladiolus Bulbs - Glad you Are Here Mixture
$7.00 $13.99
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