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]()
Eggplant Seeds - Round Mauve
Round Mauve eggplant are 3 inch in diameter. Fruits are mauve and round with white flesh. Plants grow 24-36 inches tall. Sow seeds indoors and transplant outdoors in full sun...
Corn Seeds - Popcorn - Strawberry
100 Days to maturity. Zea mays. Popcorn - Strawberry Corn Seeds. Non-GMO, annual, open-pollinated, heirloom, Pop Corn. Suitable for growing in garden plots or raised beds. Corn tolerates heat and...
Tomato Seeds - Slicing - Purple Calabash
80-90 Days to maturity (from transplant). Solanum lycopersicum. Purple Calabash Tomato Seeds. Non-GMO, warm season annual, open-pollinated, heirloom, drought tolerant, indeterminate, slicing tomato. Suitable for growing in garden plots, raised...
Onion Seeds - Short - Superex Yellow Hybrid
160 Days to maturity. Allium cepa. Superex Yellow Onion Seeds. Non-GMO, annual, hybrid, bulbing, short-day onion. Suitable for growing in greenhouses, garden plots, and raised beds. Resistant to disorders. Alt...
Chinese Cabbage Seeds - Kogane
Chinese Cabbage Seeds - Kogane. Heirloom, Non-GMO. Brassica rapa var pekinensis. 5-7 days microgreens, 70-80 days to maturity. Cool season annual. Kogane means gold in Japanese. When mature, the loose...
Mustard Seeds - Senposai Komatsuna Hybrid
30-40 to maturity. Brassica rapa var. perviridis. Senposai Komatsuna Mustard Seeds. Non-GMO, warm or cold-season, annual, hybrid. This popular traditional Japanese komatsuna hybrid has glossy, thick dark green leaves and...
Melon Seeds - Ananas
90-110 Days to maturity. Cucumis melo. Ananas Melon Seeds. A non-GMO, annual, open-pollinated, heirloom, heat-tolerant Melon. Suitable for growing in garden plots, raised beds, and greenhouses. Originating from France, these...
Tomato Seeds - Slicing - Brandymaster Red Hybrid
80 Days to maturity (from transplant). Solanum lycopersicum. Brandymaster Red Hybrid Tomato Seeds. Non-GMO, annual, F1 hybrid, indeterminate, potato leaf, slicing tomato. Suitable for growing in garden plots, raised beds,...
Tomato Seeds - Slicing - Long Keeper
78 Days to maturity (from transplant). Solanum lycoperscium. Long Keeper Tomato Seeds. Non-GMO, annual, open-pollinated, heirloom, determinate, slicing tomato. Suitable for growing in garden plots, raised beds, and greenhouses. Resistant...
Cucumber Seeds - Green Dragon Burpless F1
70 Days to maturity. Cucumis sativus. Green Dragon Burpless Hybrid Cucumber Seeds. Non-GMO, annual, F1 hybrid, monoecious, burpless, slicing cucumber. Suitable for growing in fields, containers (with support), garden plots,...
Carrot Seeds - Amsterdam
Amsterdam Carrot Seeds. AKA: Amsterdam Forcing 2. 50 to 70 days. Non-GMO, Heirloom (Open Pollinated). Daucus carota. A Nantes-style carrot, the Amsterdam is a European heirloom cultivated for generations for...
Lettuce Seeds - Pointed Taiwan Sword Leaf
75-85 day maturity. Lactuca sativa var. asparagina. Pointed Taiwan Sword Celtuce Lettuce Seeds. Non-GMO, cool-season annual heirloom. This variety of Chinese stem lettuce is perfect for home gardeners. Chinese stem...
Tomato Seeds - Slicing - Katana Hybrid
60 Days to maturity (from transplant). Solanum lycopersicum. Katana Hybrid Japanese Tomato Seeds. Non-GMO, warm season annual, F1 hybrid, semi-determinate, slicing tomato. Suitable for growing in garden plots, raised beds,...
Chinese Cabbage Seeds - Blues - Hybrid
50-60 Days to maturity. Brassica rapa var Pekinensis 'Blues'. Blues Hybrid Chinese Cabbage Seeds. Annual Hybrid. This early maturity Chinese cabbage (Nappa) has many qualities like being widely adaptable for...
Pak Choi Seeds - Purple Gem Hybrid
Cabbage Seeds - Pak Choi - Purple Gem - Hybrid. Non-GMO. Brassica rapa Chinensis Group. 10-15 days microgreens; 20-30 days baby leaf; 45 days full maturity. Cool season annual. Purple...
Lettuce Seeds - Leaf - New Red Fire
50 to 55 Days to maturity. Lactuca sativa. New Red Fire Leaf Lettuce Seeds. Annual, Heirloom, Open Pollinated. This large ruffled and loose-leaf lettuce is green at the base of...
Carrot Seeds - Bambino
Bambino Carrot Seeds. 60 days to maturity. Daucus carota. Heirloom, Annual. Super Sweet baby gourmet carrot color develops quickly can pull early. Approximately 18,000 seeds/ounce Download Free Vegetable Growing Guide...
Cucumber Seeds - Carolina F1
50 Days to maturity. Cucumis sativus. Carolina Hybrid Cucumber Seeds. Non-GMO, annual, F1 hybrid, gynoecious, pickling cucumber. Suitable for growing in fields, containers (with support), garden plots, raised beds, and...
Eggplant Seeds - Bride F1
Bride F1 Hybrid Eggplant Seeds. Solanum melongena. F1 Hybrid. Non-GMO. Annual. 70 days to maturity. Eggplant Bride F1 is a beautiful hybrid Asian eggplant known for its mild flavor and...
Lettuce Seeds - Leaf - Merlot
Merlot Leaf Lettuce Seeds. 55 days to maturity. Lactuca sativa. Heirloom, Annual. Merlot is a loose-leaf type with an intense deep burgundy color. Approximately 25,000 seeds/ounce. Lettuce Seeds - Leaf...
Corn Seeds - Ornamental - Earth Tones Dent
100 Days to maturity. Zea mays. Ornamental - Earth Tone Dent Corn Seeds. Non-GMO, annual, open-pollinated, heirloom, Dent Corn. Suitable for growing in garden plots or raised beds. Corn tolerates...
Melon Seeds - Galia - Gallo Hybrid
70 Days to maturity. Cucumis melo. Gallo Galia Melon Seeds. A non-GMO, annual, F1 hybrid, heat-tolerant Mini Galia Melon. Suitable for growing in containers, garden plots, raised beds, and greenhouses....
Pea Seeds - Shelling - Green Arrow (Treated)
65-75 Days to maturity. Pisum sativum. Green Arrow Pea Seeds (Treated). Non-GMO, annual, open-pollinated, heirloom, treated pea seeds. Long, slim, 4.5-inch pods grow in pairs on strong 28-inch vines. Suitable...
Lettuce Seeds - Arianna
Lactuca sativa (39 days) Attractive French variety with large foliage and small, tall open heads with thick, mint green leaves. Approx. 25,000 seeds per ounce. Download Free Vegetable Growing Guide...
Tomato Seeds - Slicing - Red Siberian
60-70 Days to maturity (from transplant). Solanum lycoperscium. Red Siberian Tomato Seeds. Non-GMO, annual, open-pollinated, heirloom, determinate, slicing tomato. Suitable for growing in containers, garden plots, raised beds, and greenhouses....
Tomato Seeds - Slicing - Brandymaster Yellow Hybrid
70 Days to maturity (from transplant). Solanum lycopersicum. Brandymaster Yellow Hybrid Tomato Seeds. Non-GMO, annual, F1 hybrid, indeterminate, potato leaf, slicing tomato. Suitable for growing in garden plots, raised beds,...
Lettuce Seeds - Okayama Salad
50-60 days to maturity. Lactuca sativa ‘Okayama Salad’. Okayama Salad Lettuce Seeds. Non-GMO, cool-season annual heirloom. This early-maturing butterhead lettuce is a Japanese variety known for its delicate flavor and...
Tomato Seeds - Cherry - Gardener's Delight (Organic)
50-80 Days to maturity (from transplant). Solanum lycoperscium. Organic Gardeners Delight Tomato Seeds. Non-GMO, annual, organic, open-pollinated, heirloom, indeterminate, cherry tomato. Suitable for growing in garden plots, raised beds, and...
Cucumber Seeds - Pickling - Calypso Hybrid (Organic)
50 Days to maturity. Cucumis sativus. Organic Calypso Hybrid Cucumber Seeds. Non-GMO, annual, organic, F1 hybrid, gynoecious, pickling cucumber. Suitable for growing in fields, containers (with support), garden plots, raised...
Cabbage Seeds - Brunswick (Organic)
70 Days to maturity. Brassica oleracea ’Brunswick’. Organic Brunswick Cabbage Seeds. Non-GMO, cool weather annual. Introduced in 1824 to the United States from Germany, this cabbage is excellent for making...
Eggplant Seeds - Galaxy of Stars
Galaxy of Stars Eggplant Seeds. 57 days to maturity. Solanum melongena. Open Pollinated, Annual. Galaxy of stars is a beauty at 3 to 4 inches long. These plump fruits are...
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