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 - Savoy Perfection
90 days. The Savoy Perfection cabbage is a unique variety that doesn't produce the sulfur-like smell that other varieties of cabbage do when they are cooked. It is a hardy...
Petunia Seeds - Double Cascade Series (Pelleted)
98-105 Days to maturity. Petunia x hybrida. Pelleted Double Cascade Series Petunia Seeds. Non-GMO, hybrid, Premium Quality Seeds, annual. Growing Double Cascade Series seeds promise to excite your garden with...
Kale Seeds - Premier
60 days. Premier Kale is a high yielding variety high in nutrients. This crop is leafy and green in color. Premier Kale is versatile and can be used for kale...
Tomato Seeds - Cherry - Yellow Pear
78 Days to maturity (from transplant). Solanum lycoperscium. Yellow Pear Tomato Seeds. Non-GMO, annual, open-pollinated, heirloom, heat tolerant, indeterminate, cherry tomato. Suitable for growing in garden plots, raised beds, and...
Cucumber Seeds - Sweet Success Hybrid
60 days. The Sweet Success Hybrid cucumber is a large variety of cucumber that is sweet and tender. The Sweet Success Hybrid is dark green and smooth, and grows to...
Zinnia Seeds - Zahara Series (Coated)
50-60 Days to maturity. Zinnia elegans. Zahara Series Zinnia Seeds. Non-GMO, annual. Zahara Series Zinnia flower seeds are brilliant, easy to grow, and renowned for their hardiness and ability to...
Pepper Seeds - Hot - Bhut Jolokia Ghost
120-129 Days to maturity (from transplant). Capsicum chinense. Bhut Jolokia Ghost Pepper Seeds. Non-GMO, annual, open-pollinated, heirloom, deer resistant, heat tolerant, drought tolerant, hot pepper with extremely hot heat levels....
Lettuce Seeds - Leaf - Oakleaf
Non-GMO Oakleaf lettuce is ready 55-65 days. Utah State University recommends this lettuce strain. The Oakleaf can tolerate colder temperatures. The leaves of the Oakleaf have a mildly sweet flavor,...
Lettuce Seeds - Leaf - Salad Bowl Green
45-50 days. An AAS winner, these non-GMO Salad Bowl Green seeds grow into green leaves of lettuce that are ready to harvest in 45 to 50 days. The Salad Bowl...
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...
Celery Seeds - Tendercrisp
90-105 days. Non-GMO. Open-pollinated. Tendercrisp Celery Seeds from True Leaf Market grow a compact celery head with 12" dark green stalks. The entire Tendercrisp celery plant reaches about 26" tall...
Pak Choi Seeds - Shanghai
Cabbage Seeds - Pak Choi - Shanghai. Heirloom, Non-GMO. Annual. Brassica rapa Chinensis group. 10-15 days microgreens; 20-30 days baby leaf; 45 days full maturity. Cool-season. This green stem variety...
Mini Pet Grass Kit
Give your cat or dog the treat of sweet green wheat grass that they crave! Giving them this nutritious green wheatgrass treat will not only make them happy but will...
Onion Seeds - Long - Ruby
100 Days to maturity. Allium cepa. Ruby Onion Seeds. Non-GMO, annual, open-pollinated, heirloom, cold tolerant, bulbing, long-day onion. Suitable for growing in greenhouses, garden plots, raised beds, and containers. Ruby...
Parsnip - Hollow Crown
Non-GMO, Open-Pollinated, Heirloom Hollow Crown Parsnip Seeds from True Leaf Market. 100 to 120 days. Good storage variety with a sweet taste that grows up to 15" long. Originating in...
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....
Dill Seeds - Dukat
50 Days to maturity. Anethum graveolens. Dukat Dill Seeds. Non-GMO, annual, open-pollinated, heirloom. Suitable for growing in fields, containers, garden plots, and raised beds. Dukat Dill is a premium Danish...
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....
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