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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Geranium Seeds - Maverick Series
91-105 days maturity. Pelargonium x hortorum . Geranium Maverick Series Seeds. Non-GMO, Annual. Ornamental. Maverick Series geranium seeds are an adorable, compact, and vibrant addition to grow in any home...
Petunia Seeds - Supercascade Series (pelleted)
98-105 Days to maturity. Petunia x hybrida Supercascade Series Petunia Seeds. Non-GMO, hybrid, Premium Quality Seeds, annual. Supercascade Series seeds will delight your garden with the largest and most robust...
Petunia Seeds - Easy Wave Series (pelleted)
98-105 Days to maturity. Petunia x hybrida. Easy Wave Series Petunia Seeds. Non-GMO, hybrid, Premium Quality Seeds, annual. Easy Wave Series petunia seeds grow one of summer's most famous and...
Begonia Seeds - Tuberous - Nonstop Series (Pelleted)
119-133 Days to maturity. Begonia x tuberhybrida. Nonstop Series Tuberous Begonia Seeds. Non-GMO, hybrid, perennial, pelleted. Nonstop Series pelleted seeds promise exotic, easygoing 2-3-inch, mostly double blooms for hot, humid...
Geranium Seeds - Pinto Premium Series
91-105 days maturity. Pelargonium x hortorum . Geranium Pinto Premium Series Seeds. Non-GMO, Annual. Ornamental. Pinto Premium Series geranium seeds promise some of the most classic yet eye-catching blooms available...
Petunia Seeds - Dreams Series (pelleted)
98-105 Days to maturity. Petunia x hybrida. Dream Series Petunia Seeds. Non-GMO, hybrid, Premium Quality Seeds, annual. Dreams Series petunia seeds are an essential and timeless flower in your garden,...
Petunia Seeds - Madness Series (pelleted)
98-105 Days to maturity. Petunia x hybrida. Pelleted Madness Series Petunia Seeds. Non-GMO, hybrid, Premium Quality Seeds, annual. Madness Series petunia seeds are an easy way to splash some early-blooming...
Petunia Seeds - Daddy Series (Pelleted)
98-105 days. Daddy Series petunia seeds grow an adorable, compact, and vibrant addition to any home, office, or garden. Daddy Series petunias are durable and easy to grow from seed,...
Impatiens Seeds - Accent Series
70-77 Days to maturity. Impatiens walleriana. Accent Series Impatiens Seeds. Non-GMO, hybrid, annual. Premium Quality Seeds. Accent Series seeds deliver the country's most popularly grown and undisputed summertime bloom. Impatiens...
Strawberry Seeds - Berries Galore Hybrid Pink
Package of 100 seeds. 75 days. Everbearing runner variety. In full sun, medium-large fruit saturated with sweetness and nutritious goodness; a fast grower; can be harvested every 3 to 4...
Gazania Seeds - New Day Series
84-91 Days to maturity. Gazania splendens. Gazania New Day Series Seeds. Non-GMO, Annual. New Day Series gazania seeds grow some of the most recognizable summertime blooms both indoors and out!...
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...
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,...
Strawberry Seeds - Berries Basket White Hybrid
Berri Basket White Hyrbid strawberries are ready in 85 days. Strawberry variety is well suited for baskets. Hardy to zone 5, the ever-bearing, runnerless, compact and bushy plants bear large,...
Petunia Seeds - Double Madness Series (pelleted)
98-105 Days to maturity. Petunia x hybrida. Pelleted Double Madness Series Petunia Seeds. Non-GMO, hybrid, Premium Quality Seeds, annual. Double Madness Series seeds grow a hardy and spectacular alternative to...
Begonia Seeds - Fibrous - Cocktail Series (Pelleted)
105-112 Days to maturity. Begonia x semperflorens. Cocktail Series Fibrous Begonia Seeds. Non-GMO, hybrid, annual flower. Cocktail Series seeds easily grow classic and tidy begonias bursting with timeless - inch...
Zinnia Seeds - Profusion Series (Coated)
54-70 Days to maturity. Zinnia elegans x angustifolia. Profusion Series Zinnia Seeds. Non-GMO, organic, annual. Profusion Series Zinnia flower seeds promise to turn your tired summer bedding into an award-winning...
Petunia Seeds - Wave Series (pelleted)
98-105 Days to maturity. Petunia x hybrida. Wave Series Petunia Seeds. Non-GMO, hybrid, Premium Quality Seeds, annual. Growing Wave Series seeds this season promises to reinvigorate any stale flower bed,...
Snapdragon Seeds - Rocket Series
115-121 Days to maturity. Antirrhinum majus. Rocket Series Snapdragon Seeds. Non-GMO, Premium Quality Seeds, hybrid, annual. Rocket Series snapdragon seeds promise vibrant, dense, and award-winning blooms ideal for the garden,...
Petunia Seeds - Hulahoop Series (pelleted)
98-105 Days to maturity. Petunia x hybrida. Pelleted Hulahoop Series Petunia Seeds. Non-GMO, hybrid, Premium Quality Seeds, annual. Pelleted seeds. Hulahoop Series seeds grow a dazzling, fun, and unique variation...
Verbena Seeds - Quartz XP Series
84-91 Days to maturity. Verbena x hybrida. Verbena Quartz XP Series Seeds. Non-GMO, Perennial. Verbena Quartz XP Series seeds are a classic and award-winning addition to any home or garden...
Snapdragon Seeds - Floral Showers Series
115-121 Days to maturity. Antirrhinum majus. Floral Showers Series Snapdragon Seeds. Non-GMO, Premium Quality Seeds, hybrid, annual. Floral Showers snapdragon seeds grow fragrant, nostalgic, and vibrant blooms where other flowers...
Pepper Seeds - Sweet - Gypsy Hybrid
62 Days to maturity (from transplant). Capsicum annuum. Gypsy Hybrid Pepper Seeds. Non-GMO, annual, hybrid, AAS Winner, sweet-type, with no heat levels. 0 Scoville Heat Units. Suitable for growing in...
Hibiscus Seeds - Luna Series
70-84 days to maturity. Hibiscus moscheutos. Hibiscus Luna Series Seeds. Non-GMO, F1 hybrid, perennial. Luna Series hibiscus seeds promise robust and long-lasting blooms to your garden when other flowers can...
Petunia Seeds - Tidal Wave Series (pelleted)
98-105 Days to maturity. Petunia x hybrida. Tidal Wave Series Petunia Seeds. Non-GMO, hybrid, Premium Quality Seeds, annual. Open Pollinated. Tidal Wave Series petunia seeds grow one of the season’s...
Pepper Seeds - Sweet - Big Bertha Hybrid
73 Days to maturity (from transplant). Capsicum annuum. Big Bertha Hybrid Pepper Seeds. Non-GMO, annual, F1 hybrid, sweet pepper with no heat level. 0 Scoville Heat Units. Resistant to Tobamovirus...
Snapdragon Seeds - Sonnet Series
115-121 Days to maturity. Antirrhinum majus. Sonnet Series Snapdragon Seeds. Non-GMO, Premium Quality Seeds, hybrid, annual. Sonnet Series snapdragon seeds grow a fragrant, classic, and authentic touch of the Mediterranean...
Petunia Seeds - Picobella Series (pelleted)
98-105 Days to maturity. Petunia x hybrida. Picobella Series Petunia Seeds. Non-GMO, hybrid, Premium Quality Seeds, annual. Picobella seeds promise one of summer's most exclusive, vibrant, yet smallest petunias grown...
Pepper Seeds - Hot - Thai Super Chili Hybrid
75 Days to maturity (from transplant). Capsicum annuum. Thai Super Chili Hybrid Pepper Seeds. Non-GMO, annual, hybrid, open-pollinated, high-yielding, deer-resistant, heat-tolerant, drought-tolerant, hot pepper with hot heat levels. 50,000 to...
Petunia Seeds - Frost Series (Pelleted)
98-105 Days to maturity. Petunia x hybrida. Frost Series Petunia Seeds. Non-GMO, hybrid, Premium Quality Seeds, annual. Frost Series seeds grow a delightful, unique, and lively variation of the world-famous...
Pepper Seeds - Hot - Super Chili Hybrid
75 Days to maturity (from transplant). Capsicum annuum. Super Chili Hybrid Pepper Seeds. Non-GMO, annual, F1 hybrid, AAS winner, high yielding, deer resistant, heat tolerant, drought tolerant, hot pepper with...
Beet Seeds - Red Ace Hybrid
50 days. The Red Ace beet is a variety that is highly adaptable and that can grow in cooler temperatures. The Red Ace matures a week before many other beets,...
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