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]()
Gourd Seeds - Bitter Green - Hybrid
56-63 Days to Maturity (after transplanting). Momordica charantia. Bitter Green Bitter Gourd Seeds. Non-GMO, warm-season, annual, hybrid. This bitter gourd produces a generous crop of large, heavy, and uniform fruits...
Watermelon Seeds - Giant - Congo
95 Days to maturity. Citrullus lanatus. Congo Watermelon Seeds. Non-GMO, annual, organic, open-pollinated, heirloom, heat tolerant, seeded, giant watermelon. Resistant to Anthracnose (1). Congo Watermelon produces sweet, red-fleshed melons up...
Endive Seeds - Witloof Chicory
Non-GMO Witloof Chicory is a Belgian Endive variety that is great for home gardening. After 55-115 days, Witloof Chicory should reach full size. Leaves can be taken at any time,...
Tomato Seeds - Paste - Napoli
75-90 Days to maturity (from transplant). Solanum lycoperscium. Napoli Tomato Seeds. Non-GMO, annual, open-pollinated, determinate, Italian paste tomato. Suitable for growing in garden plots, raised beds, and greenhouses. Resistant to...
Pepper Seeds - Sweet - Giant Aconcagua
70 Days to maturity (from transplant). Capsicum annuum. Giant Aconcagua Pepper Seeds. Non-GMO, annual, open-pollinated, heirloom, high-yielding, sweet pepper with no heat. 0 Scoville Heat Units. Suitable for growing in...
California Poppy Seeds - Mission Bells
56-70 Days to maturity. Eschscholzia californica. Mission Bells California Poppy Seeds. Non-GMO, annual. Mission Bells California poppy seeds grow a classic, durable, and authentic touch of the cool California hills...
Squash Seeds - Winter - Delicata Bush AAS
Delicata Bush AAS Winter Squash Seeds. 80 - 100 days to maturity. 2002 National AAS Winner. Can be grown in containers. Cucurbita pepo. Annual. Healthy semi-bush 3-4 ft. vines, dark...
Basil Seeds - Spicy Globe
Non-GMO, Spicy Globe Basil Herb Seed from True Leaf Market. Ocimum basilicum. As basil has many different varieties, Spicy Globe Basil is a dwarf hybrid and one of the smallest...
Triticale (Organic) - Cover Crop Seeds
90 Days. xTriticosecale. Organic. Non-GMO. Open-Pollinated. A robust and highly productive hybrid between wheat (Triticum) and rye (Secale), Organic triticale seeds are a tenacious garden cover crop popularly sown overwinter...
Gourd Seeds - Cucuzzi (Italian Edible)
Cucuzzi (Italian Edible) gourds can be eaten like a squash. Gourds have light green smooth skin and pale yellow flesh, and grow up 30-48" long and 2" wide. Plants grow...
Radish Seeds - Chinese - Starburst - Hybrid
60 Days to maturity. Raphanus sativus. Starburst Chinese Radish Hybrid Seeds. Cool Season Annual. Starburst radishes are part of the watermelon radish group, which means that you’ll find bright red...
Pepper Seeds - Hot - Wicked Ghost F1 Hybrid
110-119 Days to maturity (from transplant). Capsicum chinense. Wicked Ghost F1 Hybrid Pepper Seeds. Non-GMO, annual, F1 hybrid, deer resistant, hot pepper with extremely hot heat levels. 700,000 to 900,000...
Cucumber Seeds - Bushy
48 Days to maturity. Cucumis sativus. Bushy Cucumber Seeds. Non-GMO, annual, open-pollinated, heirloom, monoecious, all-purpose cucumber for pickling or slicing. Suitable for growing in fields, containers (with support), garden plots,...
Cilantro Seeds - Santo (Organic)
55-60 Days to maturity. Coriandrum sativum. Organic Cilantro Santo Seeds. Non-GMO, annual, organic, open-pollinated, heirloom. Suitable for growing in containers, garden plots, raised beds, and greenhouses. Slow to bolt compared...
Poppy Seeds - Jimis Flag Mix (Organic)
120 Days to maturity. Papaver somniferum. Jimis Flag Mix Poppy Seeds. Non-GMO, organic, annual. Poppies are hands-down the most dramatic flowers in the garden, and this dazzling mix blooms crimson/purple,...
Mustard Seeds - Japanese Komatsuna
Japanese Komatsuna Mustard Seeds. 30 to 50 Days to full maturity. 8 to 12 days to microgreens harvest. Brassica rapa var. perviridis. Annual. Heirloom, Non-GMO, Open Pollinated. Komatsuna is popular...
Lavender Seeds - Spike
100+ Days to maturity. Lavandula latifolia. Spike Lavender Seeds. Non-GMO, perennial, open-pollinated, heirloom. Suitable for growing in fields, containers, garden plots, and raised beds. Spike Lavender is a sun-loving, aromatic...
Cucumber Seeds - Saladmore Bush Hybrid F1
55 Days to maturity. Cucumis sativus. Saladmore Bush Hybrid Cucumber Seeds. Non-GMO, annual, F1 hybrid, 2014 AAS winner. Suitable for growing in fields, containers (with support), garden plots, raised beds,...
Sweet Pea Seeds - Early Multiflora Mix
90-100 Days to maturity. Lathyrus odoratus. Sweet Pea Early Multiflora Mix Seeds. Non-GMO, annual, open-pollinated. Sweet Pea Early Multiflora Mix is the number one choice of sweet pea for winter...
Clover Seeds - Mammoth Red - Organic
Mammoth Red is the best clover for deficient soils. The plant is large with big leaves, making it an ideal grazing crop. Red clover may be the best choice for...
The True Leaf Market Herb Growing Guide
Get the True Leaf Market Herb Planting Guide! the PDF version is free, just click below to download, or purchase the print booklet with FREE shipping. In this booklet, you'll...
Tomatillo Seeds - Aunt Molly's
Aunt Molly's Tomatillo Seeds. 65 - 70 days to maturity. Physalis pruinosa. Heirloom. Annual. Indeterminate. Very sweet tomatillo with an underlying tartness. These half to three quarter inch fruits are...
Basil Seeds - Sacred (Organic)
60-90 Days to maturity. Ocimum tenuiflorum syn. O. sanctum. Organic Sacred Basil Seeds. Non-GMO, annual/perennial, organic, open-pollinated, heirloom. Suitable for growing in containers, garden plots, raised beds, and greenhouses. Also...
Corn Seeds - Sweet - Incredible R/M F1 Hybrid
85 Days to maturity. Zea mays. Incredible F1 Hybrid R/M Corn Seeds. Non-GMO, annual, hybrid, Sweet Corn. Suitable for growing in garden plots or raised beds. Corn tolerates heat and...
Cucumber Seeds - Parisian Gherkin F1 AAS
50 Days to maturity. Cucumis sativus. Parisian Gherkin Hybrid Cucumber Seeds. Non-GMO, annual, F1 hybrid, 2015 Regional AAS winning, monoecious, pickling cucumber. Suitable for growing in fields, containers (with support),...
Basil Seeds - Dark Opal
Non-GMO, Heirloom Dark Opal Basil Herb Seed from True Leaf Market. Ocimum basilicum x purpurascens. As basil has many different varieties, Dark Opal Basil Herb is a striking heirloom that...
Onion Seeds - Bunching - White Lisbon
40-60 Days to maturity. Allium fistulosum. White Lisbon Onion Seeds. Non-GMO, annual, perennial (see zone info), open-pollinated, heirloom, cold hardy, heat tolerant, drought tolerant, bunching onion. Suitable for growing in...
Medicinal Herb Storage Seeds
Open Pollinated NON-GMO Heirloom Medicinal Garden Pack The best preparation is practice so Mountain Valley Seed Co. has developed the Grow and Store line to get you prepared and growing....
Bean Seeds - Bush - Blue Lake 274 (Treated)
50-65 Days to maturity. Phaseolus vulgaris. Blue Lake 247 Bush Bean Treated Seeds. Non-GMO, annual, open-pollinated, heirloom snap bush bean. Suitable for growing in containers, garden plots, raised beds, and...
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