March is the month when most gardens really wake up. In colder regions, it is prime time for indoor seed starting and preparing beds. In milder climates, spring planting is already rolling, and in the warmest zones, the garden may be producing heavily while you begin shifting toward heat-loving crops.
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 settles.
Zones 7b-9a: These zones experience mild winter weather and are warming quickly in March. Many cool-season crops can be direct sown outdoors, and succession planting helps keep harvests coming as temperatures rise. It is also a great time to start warm-season favorites indoors while keeping frost protection on hand for unexpected cold snaps. And of course, sprouts and microgreens are always in season indoors!
Zones 9b-12: Depending on your area, March can be peak garden season in these warm-winter zones. Many crops planted earlier are now producing, and this month often marks the transition from late cool-season planting to the start of warm-season gardening. In the hottest areas, you may begin planting heat lovers while timing your last rounds of tender cool-season crops before warmer weather arrives.
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![Legend: H for Heirloom, O for Organic, A for AAS Winner, F for staff favorites]()
Basil Seeds - Thai Sweet Large Leaf
35-40 Days to maturity. Ocimum basilicum. Sweet Large Leaf Thai Basil Seeds. Non-GMO, annual, organic, open-pollinated, heirloom. Suitable for growing in fields, containers, garden plots, raised beds, and greenhouses. A...
Basil Seeds - Red Leaf Holy Basil
65-75 days maturity. Ocimum sanctum. Red Leaf Holy Basil Seeds. Non-GMO, Heirloom. Annual. Holy basil is an essential herb in the Thai kitchen due to its unique flavor. This Holy...
Oats and Peas Cover Crop Seed Mix
50-70 Days to termination. Oat and Peas Cover Crop Mix Seeds. Non-GMO, annual, winter-killing, no-till, forage-friendly. Plant as a spring, summer, or fall cover crop to restore vital nutrients and...
Collards Seeds - Champion
75-85 days. Brassica oleracea var. viridis. Champion Collards seeds grow huge, slightly crumpled, juicy leaves. These collards leaves are cabbage-like, with a dark blue-green color. Champion collards has a mild...
Tobacco Seeds - Black Sea Samsun
55–65 Days from transplant to maturity. Nicotiana tabacum. Black Sea Samsun Tobacco Seeds. Non-GMO, annual, open-pollinated, heirloom. Suitable for growing in fields, containers, garden plots, raised beds, and greenhouses. Resistant...
Strawflower Seeds - Tall Double Mix
70-84 Days to maturity. Helichrysum bracteatum. Strawflower Tall Double Mix Seeds. Non-GMO, Annual. Tall Double Mix strawflower seeds grow some of the most recognizable summertime blooms, both indoors and out!...
Tomato Seeds - Cherry - Red Pear
70 Days to maturity (from transplant). Solanum lycopersicum. Red Pear Tomato Seeds. Non-GMO, annual, open-pollinated, heirloom, indeterminate cherry tomato. Suitable for growing in garden plots, raised beds, and greenhouses. The...
Tomato Seeds - Slicing - Watermelon Beefsteak (Organic)
75 Days to maturity (from transplant). Solanum lycopersicum. Organic Watermelon Beefsteak Tomato Seeds. Non-GMO, warm season annual, organic, open-pollinated, heirloom, indeterminate, slicing tomato. Suitable for growing in garden plots, raised...
Tomato Seeds - Salad - Green Zebra (Organic)
75-90 Days to maturity (from transplant). Solanum lycopersicum. Green Zebra (organic) Tomato Seeds. Non-GMO, annual, organic open-pollinated, heirloom, heat tolerant, indeterminate, salad tomato. Suitable for growing in garden plots, raised...
Tomato Seeds - Slicing - Patio Hybrid
70 Days to maturity (from transplant). Solanum lycoperscium. Patio Hybrid Tomato Seeds. Non-GMO, annual, hybrid, determinate, drought tolerant, heat tolerant, AAS Winner, slicing tomato. Suitable for growing in garden plots,...
Echinacea Seeds - Bravado
70-84 days maturity. Echinacea purpurea. Echinacea Bravado Seeds. Non-GMO, Perennial. Bravado echinacea seeds grow one of summer's most celebrated and resilient blooms boasting classic 4-5 inch rosy pink "daisy-like" coneflowers....
Tomato Seeds - Slicing - Marglobe (Organic)
72 Days to maturity (from transplant). Solanum lycoperscium. Organic Marglobe Tomato Seeds. Non-GMO, annual, organic, open-pollinated, heirloom, determinate, drought tolerant, heat tolerant, slicing tomato. Suitable for growing in garden plots,...
African Marigold Seeds - Antigua Series
77-84 Days to maturity. Tagetes erecta. Antigua Series African Marigold Seeds. Non-GMO, annual, hybrid. Antigua Series African marigold seeds grow some of the most recognizable summertime blooms, both indoors and...
Tomato Seeds - Slicing - Super Fantastic Hybrid
70 Days to maturity (from transplant). Solanum lycopersicum. Super Fantastic Hybrid Tomato Seeds. Non-GMO, warm season annual, F1 hybrid, indeterminate, slicing tomato. Suitable for growing in garden plots, raised beds,...
Basil Seeds - Thai (Organic)
60-90 Days to maturity. Ocimum basilicum thyrsiflora. Organic Thai Basil Seeds. Non-GMO, annual, organic, open-pollinated, heirloom. Suitable for growing in fields, containers, garden plots, raised beds, and greenhouses. On the...
Gourd Seeds, Bitter - Green Skin
70 days to Maturity (after transplanting). Momordica charantia ’Green Skin’. Green Skin Bitter Gourd Seeds. Non-GMO, warm-season, annual, hybrid. This is an excellent, open-pollinated, Chinese bitter gourd that produces fruit...
Tomato Seeds - Slicing - Bonny Best
70-75 Days to maturity (from transplant). Solanum lycopersicum. Bonny Best Tomato Seeds. Non-GMO, annual, open-pollinated, heirloom, indeterminate, slicing tomato. Suitable for growing in garden plots, raised beds, and greenhouses. This...
African Marigold Seeds - Discovery Series
77-84 Days to maturity. Tagetes erecta. Discovery Series African Marigold Seeds. Non-GMO, annual, hybrid. Discovery Series African marigold seeds are an adorable, compact, and vibrant addition to grow in any...
Broccoli Seeds - Chinese Broccoli - Late Jade - Hybrid
60-70 days to maturity. Brassica oleracea var alboglabra ‘Late Jade’. Late Jade Chinese Broccoli Seeds. Non-GMO, Hybrid, Cool-season Annual. Originating in the Mediterranian, Chinese Broccoli was introduced to China in...
Echinacea Seeds - PowWow Wild Berry
70-84 days. Non-GMO, Heirloom PowWow Wild Berry Echinacea Herb Garden Seed from True Leaf Market. Echinacea purpurea. Echinacea grows as a warm perennial herb native to North America. These vigorous...
Zinnia Seeds - Dreamland Mixture (Coated)
54-70 Days to maturity. Zinnia elegans. Dreamland Mixture Zinnia Seeds. Non-GMO, organic, annual. Dreamland Mix Zinnia Flower seeds are the fastest way to splash some excitement into your garden. Dreamland...
Cauliflower Seeds - Veronica Romanesco Hybrid
77 days. This "Italian" type produces very symmetrical and spiraled, lime green heads with tightly beaded, pointed domes. Useful raw, cooked, or pickled, with a milder, sweeter flavor than standard...
Lobelia Seeds - Regatta Series (MSP)
77-84 Days to maturity. Lobelia erinus. Regatta Series Lobelia Seeds. Non-GMO, open-pollinated, Premium Quality Seeds, annual. Open Pollinated. Regatta Series seeds promise exotic, radiant, and fragrant lobelia mounds that promise...
Calendula Seeds - Fancy Mix
50-70 Days to maturity. Calendula officinalis. Fancy Mix Calendula Seeds. Non-GMO, open-pollinated, annual, ornamental herb and flower. Fancy Mix Calendulas are hardy, tolerant of cool temperatures, and produce some strikingly...
Lobelia Seeds - Sapphire
77-84 Days to maturity. Lobelia erinus. Sapphire Lobelia Seeds. Non-GMO, open-pollinated, Premium Quality Seeds, annual. Open Pollinated. Sapphire lobelia seeds grow one of summer's most exciting bedding, trailing, and hanging...
Tomato Seeds - Paste - Amish Paste (Organic)
75-90 Days to maturity (from transplant). Solanum lycopersicum. Amish Paste (Organic) Tomato Seeds. Non-GMO, annual, organic, open-pollinated, heirloom, indeterminate, paste tomato. Amish Paste tomato plants produce one of the largest...
Tomato Seeds - Cherry - Black Cherry (Organic)
75 Days to maturity (from transplant). Solanum lycoperscium. Tomato - Black Cherry (Organic) Tomato Seeds. Non-GMO, annual, organic, heirloom, AAS winner, indeterminate, slicing, paste, salad, cherry tomato. Suitable for growing...
Broccoli Seeds - Romanesco
75-100 Days to maturity. Brassica oleracea. Romanesco Broccoli Seeds. Non-GMO, annual, heirloom. The spiky heads of Romanesco Broccoli grow in an unusual fractal formation. Its Fibonacci-looking spirals create beautiful patterns...
Gourd Seeds - Tai Hoo - Hybrid - Kitazawa Spring...
79 days maturity after transplant. Lagenaria siceraria var. clavata ’Tai Hoo’. Tai Hoo Gourd Seeds. Non-GMO, warm-season, annual, hybrid. This plant produces a uniform and vigorous harvest. It is disease...
Broccoli Seeds - Romanesco - Organic
Brassica oleracea (75 days) Romanecso reminds me of the patterns you would see when looking through a kaleidoscope as a kid. It has great spiraling designs and shades of apple-green...
Orach Seeds - Purple
Non-GMO, Heirloom Purple Orach Vegetable Garden Seed from True Leaf Market. Atriplex hortensis. Purple Orach Seeds originated in Europe and Siberia as one of the oldest grown cool season crops"...
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