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]()
Oregano Seeds - Common Italian (Organic)
90 days. Organic Oregano Culinary Herb Seeds. Origanum vulgare. Perennial. Non-GMO. Organic culinary oregano seeds deliver one of the more pronounced, robust, aromatic herbs in the mint family. Tenacious and...
Watermelon Seeds - Mini - Sugar Baby
75-80 Days to maturity. Citrullus lanatus. Sugar Baby Watermelon Seeds. Non-GMO, annual, open-pollinated, heirloom, heat tolerant, seeded, mini watermelon. Suitable for growing in garden plots and large containers (minimum 7...
Crimson Clover - Cover Crop Seeds
70-90 Days. Trifolium incarnatum. Cover Crop. Non-GMO. Annual. Heirloom crimson clover seeds are an ideal annual garden companion and cover crop for plants and soils deficient in nitrogen. Use to...
Lavender Seeds - Common English (aka Vera)
2nd Year Maturity. Non-GMO, Heirloom Common English Lavender Herb Garden Seed from True Leaf Market. Also known as Vera Lavender. Lavandula angustifolia. Lavender is a flowering perennial herb, native to...
Pepper Seeds - Sweet - Golden Cal Wonder
72 Days to maturity (from transplant). Capsicum annuum. Golden Cal Wonder Pepper Seeds. Non-GMO, annual, open-pollinated, heirloom, high-yielding, drought tolerant, sweet-type, with no heat levels. 0 Scoville Heat Units. Suitable...
Tomato Seeds - Salad - Better Boy Plus Hybrid
70 Days to maturity (from transplant). Solanum lycoperscium. Better Boy Tomato Seeds. Non-GMO, annual, hybrid, heat tolerant, indeterminate, salad tomato. Suitable for growing in garden plots, raised beds, and greenhouses....
Pepper Seeds - Sweet - Sweet Banana
70 Days to maturity (from transplant). Capsicum annuum. Sweet Banana Pepper Seeds. Non-GMO, annual, open-pollinated, heirloom, sweet pepper with mild heat levels. Drought tolerant, heat tolerant. 0 to 500 Scoville...
Radish Seeds - Daikon Minowase
Raphanus sativus (45 days) AKA Japanese Minowase Daikon Radish. Daikon is a root vegetable reported to have originated in the Mediterranean and brought to China for cultivation around 500 B.C....
Squash Seeds - Winter - Vegetable Spaghetti
80-100 days. Vegetable Spaghetti Winter Squash Seeds. Cucurbita pepo. Non-GMO. Open Pollinated. Grow your own pasta replacement with Vegetable Spaghetti Winter squash seeds. This spaghetti squash is ready in just...
Lettuce Seeds - Butterhead - Buttercrunch
60-70 days. Buttercrunch Lettuce Seeds. Lactuca sativa. Non-GMO. Open Pollinated. An award-winning and absolutely hardy cultivar of butter head, Buttercrunch is tender, delicious, and looks as good in the garden...
Nasturtium Seeds - Jewel Mix
54-63 Days to maturity. Tropaeolum majus. Organic Nasturtium Jewel Mix Seeds. Non-GMO, annual, heirloom. Jewel Mix nasturtium is brilliant, easy to grow from seed, and perfectly suited for many dry...
Tomato Seeds - Paste - San Marzano Indeterminate
85 Days to maturity (from transplant). Solanum lycoperscium. San Marzano (Indeterminate) Tomato Seeds. Non-GMO, annual, open-pollinated, heirloom, indeterminate, paste tomato. Often compared to the famous Roma tomato in terms of...
Lemon Balm Seeds
Melissa officinalis Perennial. Non-GMO, Heirloom Lemon Balm Herb Garden Seed from True Leaf Market. Melissa officinalis. Lemon Balm resides in the mint family and is native to regions in West...
Kale Seeds - Vates Blue Scotch Curled
60-70 days. Vates Blue Scotch Curled Kale Seeds. Brassica oleracea var. acephalla. Non-GMO. Heirloom. The premier variety of curled kale, Vates Blue Scotch is a tenacious cold-weather favorite known to...
Tomato Seeds - Salad - Celebrity Plus Hybrid
72 Days to maturity (from transplant). Solanum lycoperscium. Celebrity Plus Hybrid Tomato Seeds. Non-GMO, annual, hybrid, AAS winner, semi-determinate, salad tomato. Suitable for growing in garden plots, raised beds, and...
Melon Seeds - Cantaloupe - Hales Best Jumbo (Organic)
85-110 Days to maturity. Cucumis melo. Hale's Best Jumbo Cantaloupe Melon Seeds. A non-GMO, annual, heirloom, open-pollinated, organic, heat-tolerant, drought-tolerant Cantaloupe Melon. Suitable for growing in garden plots, raised beds,...
Chamomile Seeds - German
Non-GMO, Heirloom German Chamomile Herb Garden Seed from True Leaf Market. Matricaria chamomilla. German Chamomile plants originated in Western Asia and were later cultivated in Europe, where chamomile has been...
Bean Seeds - Bush - Contender
50-65 Days to maturity. Phaseolus vulgaris. Contender Bush Bean Seeds. Non-GMO, annual, open-pollinated, heirloom, high yielding, heat tolerant, bush, snap, stringless bean. Suitable for growing in containers, garden plots, raised...
Radish Seeds - Champion
Non-GMO, Heirloom, champion radish seeds. 25 days. AAS Winner. Recommended by USU. Deep scarlet, globe-shaped root is very firm and stands well without becoming pithy. Fresh, spicy-sweet flavor, Champion radishes...
Beet Seeds - Golden Detroit
55-60 days. Golden Detroit beet seeds. Beta vulgaris. Annual. Non-GMO. The Golden Detroit is an easy to grow beet that can be harvested as early as fifty days after planting,...
Borage Herb Seeds
60-70 Days. Borage Culinary Herb Seeds. Borago officinalis. Non-GMO. Heirloom. Borage seeds are grown as both an indoor culinary herb and an open-pollinated garden herb. Non-GMO Borage seeds produce some...
Pepper Seeds - Hot - Jalapeno (Organic)
Organic, heirloom, Non-GMO Jalapeno pepper seeds are a great hot pepper to start due to their ease and versatility. The heat is between 2,000 and 8,000 Scoville Units. Hot peppers...
Cucumber Seeds - Straight Eight
55-60 days. Straight Eight Cucumber Seeds. Cucumis sativus. Non-GMO. Heirloom. Nearly a century-old American heirloom, the Straight Eight is an award-winning slicing cucumber known for its uniformly straight 8 inch...
Cabbage Seeds - Red Acre
100 days. The Red Acre cabbage is a hardy garden crop that can be grown in climate zones three through nine. The plant produces medium sized, maroon heads that can...
Zinnia Seeds - California Giant Mix
75-90 Days to maturity. Zinnia elegans. California Giant Mixture Zinnia Seeds. Non-GMO, organic, annual. The “king of summer annuals" California Giant Mix seeds are the largest variety of Zinnias ever,...
Lettuce Seeds - Gourmet Mix (Organic)
45-65 days. Organic Gourmet Mixture Lettuce Seeds. Lactuca sativa. Heirloom. Mixed Greens. Organic Gourmet Mix lettuce seeds feature a specialty blend of choice tender loose-leaf lettuce greens to help diversify...
Common Thyme Seeds (Organic)
Certified Organic. Non-GMO. Perennial. 85 days. Non-GMO, Heirloom Organic Common Thyme Herb Garden Seed from True Leaf Market. Genus Thymus. Common Thyme is a cold hardy perennial that grows as...
Stevia Seeds - Sweet Herb
40 to 60 days. Stevia rebaudiana Annual in cold climates. 40 to 60 days. Non-GMO, Heirloom Sweet Stevia Herb Garden Seed from True Leaf Market. Stevia rebaudiana. Stevia is a...
Onion Seeds - Long - Walla Walla
90-110 Days to maturity. Allium cepa. Walla Walla Onion Seeds. Non-GMO, annual, open-pollinated, heirloom, cold tolerant, bulbing, long-day onion. Suitable for growing in greenhouses, garden plots, and raised beds. Walla...
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