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.
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![Legend: H for Heirloom, O for Organic, A for AAS Winner, F for staff favorites]()
Cabbage Seeds - Early Round Dutch
Brassica oleracea (75 days) Also called "Round Dutch Cabbage" Early round Dutch has solid uniform, oval heads that weigh 2-5 lbs. Small, short-stemmed, short core, good wrapper leaves and slow...
Bean Seeds - Bush - Blue Lake (Organic)
50-65 Days to maturity. Phaseolus vulgaris. Organic Blue Lake Bush Bean Seeds. Non-GMO, annual, open-pollinated, heirloom snap bush bean. Suitable for growing in containers, garden plots, raised beds, and greenhouses....
Bean Seeds - Bush - Royal Burgundy
50-65 Days to maturity. Phaseolus vulgaris. Royal Burgundy Bush Bean Seeds. Non-GMO, annual, open-pollinated, heirloom, high-yielding, bush, snap bean. Suitable for growing in containers, garden plots, raised beds, and greenhouses....
Tomato Seeds - Cherry - Gold Nugget
60 Days to maturity (from transplant). Solanum lycoperscium. Gold Nugget Tomato Seeds. Non-GMO, annual, open-pollinated, heirloom, determinate, cherry tomato. Suitable for growing in garden plots, raised beds, and greenhouses. Resistant...
Onion Seeds - Bunching - Evergreen White Nebuka
65-120 Days to maturity. Allium fistulosum. Evergreen White Nebuka Onion Seeds. Non-GMO, perennial, open-pollinated, heirloom, cold tolerant, bunching onion. Suitable for growing in greenhouses, garden plots, raised beds, and containers....
Lettuce Seeds - Leaf - Grand Rapids
50-60 days. These non-GMO Grand Rapids lettuce seeds grow into large green leaves that are resistant to tip burn. Grand Rapids Lettuce is ready to harvest in 55 days. The...
Gourds Seeds - Birdhouse
110+ days. Fun, easy to grow plants yield gourds that can be made into attractive hanging birdhouses or dippers. Allow fruit to mature on vine as long as possible. Approximately...
Pepper Seeds - Hot - Tabasco
75-90 Days to maturity (from transplant). Capsicum frutescens. Tabasco Pepper Seeds. Non-GMO, annual, open-pollinated, heirloom, high-yielding, deer resistant, heat tolerant, drought tolerant, hot pepper hot heat levels. 30,000 to 50,000...
Pepper Seeds - Hot - Big Jim
70-100 Days to maturity (from transplant). Capsicum annuum. Big Jim Pepper Seeds. Non-GMO, annual, organic, open-pollinated, heirloom, high yielding, deer resistant, heat tolerant, drought tolerant, hot pepper with medium heat...
Lettuce Seeds - Super Red Romaine
Lactuca sativa (40 days) Super Red Romaine Lettuce has long crunchy spoon shaped leaves that start green and turn to an intense red. Very intense colored romaine that is highly...
African Marigold Seeds - Taishan Series
77-84 days. Taishan Series is easy to grow from seed and delivers neat and disease-tolerant marigolds ideal for gardens prone to heat, drought, and poor soils. With 20% shorter peduncles...
Mixed Greens Seeds - Mesclun Mix - Organic
A succulent blend of gourmet greens that will satisfy your pallet and is extremely healthy. This mesclun blend is the type normally served in fine restaurants, but you can grow...
Marshmallow Herb Seeds
60-90 Days to maturity. Althaea officinalis. Marshmallow Herb Seeds. Non-GMO, perennial, open-pollinated, heirloom. Suitable for growing in fields, containers, garden plots, and raised beds. A beautiful pollinator and traditional medicinal...
Corn Seeds - Flour - Painted Mountain (Organic)
90 Days to maturity. Zea mays. Painted Mountain Organic Corn Seeds. Non-GMO, warm season annual, certified organic, open-pollinated, heirloom, Flour Corn. Suitable for growing in garden plots or raised beds....
Onion Seeds - Long - White Sweet Spanish
120 Days to maturity. Allium cepa. White Sweet Spanish Onion Seeds. Non-GMO, annual, open-pollinated, heirloom, cold tolerant, bulbing, long-day onion. Suitable for growing in greenhouses, garden plots, raised beds, and...
Bean Seeds - Pole - Scarlet Runner
50-75 Days to maturity. Phaseolus coccineus. Scarlet Runner Bean Seeds. Non-GMO, annual, open-pollinated, heirloom, high-yielding, AAS Winner, drought tolerant, high-yielding, pole, snap string bean. Suitable for growing in containers, garden...
Cabbage Seeds - Golden Acre (Organic)
65 Days to maturity. Brassica oleracea var. capitata. Organic Golden Acre Cabbage Seeds. Non-GMO, annual, organic, open-pollinated, heirloom cabbage seeds. Suitable for growing in fields, containers, garden plots, raised beds,...
Onion Seeds - Short - Red Grano
112 Days to maturity. Allium cepa. Red Grano Onion Seeds. Non-GMO, annual, open-pollinated, heirloom, cold tolerant, bulbing, short-day onion. Suitable for growing in greenhouses, garden plots, raised beds, and containers....
Pumpkin Seeds - Dills Atlantic Giant
120 days. Dill's Atlantic Giant Pumpkin Seeds. Cucurbita maxima. Open Pollinated. Non-GMO. Whether growing a pumpkin worthy of the county fair or looking to create enormous jack-o-lanterns for fall, Dill's...
Tomato Seeds - Slicing - Marglobe
72 Days to maturity (from transplant). Solanum lycoperscium. Marglobe Tomato Seeds. Non-GMO, annual, open-pollinated, heirloom, determinate, drought tolerant, heat tolerant, slicing tomato. Suitable for growing in garden plots, raised beds,...
Beet Seeds - Golden - Organic
(58 days) aka Golden Detroit Golden beet made its debut in 1970. If you are annoyed with those pesky red beets "bleeding" all over your counters, then this is the...
Cucumber Seeds - Pickling - Bush Pickle
50 Days to maturity. Cucumis sativus. Bush Pickle Cucumber Seeds. Non-GMO, annual, open-pollinated, heirloom, monoecious, pickling cucumber. Suitable for growing in fields, containers, garden plots, raised beds, and greenhouses (with...
Lovage Seeds
Non-GMO, Heirloom Lovage Herb Garden Seed from True Leaf Market. Levisticum officinale. Lovage is a leafy perennial herb originating from regions in Southern Europe. This hardy and herbaceous variety is...
Larkspur Seeds - Giant Imperial Mixture
77-84 days to maturity. Delphinium consolida. Giant Imperial Mix Larkspur Flower Seeds. Non-GMO, annual, open-pollinated. This crop is suitable for growing in fields, containers, garden plots, raised beds, and greenhouses....
Snapdragon Seeds - Liberty Classic Series Mix
84-98 Days to maturity. Antirrhinum majus. Liberty Classic Series Mix Snapdragon Seeds. Non-GMO, Premium Quality Seeds, hybrid, annual. Growing Liberty Classic Series Mix snapdragon seeds this season is a timeless,...
Portulaca Seeds - Double Mix
84-91 Days to maturity. Portulaca grandiflora. Double Mix Portulaca Seeds. Non-GMO, annual. Double Mix portulaca seeds promise some of the most stunning, and most convenient succulents available to home gardeners....
Dandelion Seeds - True (Wild)
Taraxacum officinale. Non-GMO, Heirloom True (Wild) Dandelion Herb Garden Seed from True Leaf Market. True wild Dandelions grow as tender perennials native to regions in Asia and Europe. Herbaceous and...
Italian Dandelion Seeds
Non-GMO, Heirloom Italian (Chicory) Dandelion Herb Garden Seed from True Leaf Market. Cichorium intybus. This is a tender perennial that originates from Italy and isa type of chicory or endive....
Dill Seeds - Dwarf Fernleaf
Non-GMO, Heirloom Dwarf Fernleaf Dill Herb Garden Seed from True Leaf Market. Anethum graveolens. Dwarf Fernleaf Dill grows as slow-bolting warm-season annuals and is native to South Russia and regions...
Sorrel Seeds - Garden Large Leaf
50-60 Days to maturity. Rumex acetosa. Garden Large Leaf Sorrel Seeds. Non-GMO, perennial, open-pollinated, heirloom. Suitable for growing in fields, containers, garden plots, and raised beds. Enjoy a perennial herb...
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