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]()
Zinnia Seeds - Cut and Come Again (Organic)
60-70 Days to Maturity. Zinnia elegans. Organic Cut and Come Again Zinnia Flower Seeds. Non-GMO, organic, heirloom, open-pollinated flowers. Annual in zones 3, 4, 5, 6, 7, 8, 9, and...
Ricinus Seeds - Castor Bean
56-63 Days to maturity. Ricinus communis. Castor Bean Seeds: Non-GMO. Open Pollinated. Ornamental. Annual. Castor Bean seeds grow one of the tallest, and most notorious blooms in the world! Ricinus...
Nasturtium Seeds - Whirlybird Mix
Whirlybird Nasturtium flower garden seeds. Annual Flower. Edible Flowers. This strain boasts a better range of flower colors when grown on to maturity. Edible flowers include scarlet, pale yellow, soft...
Squash Seeds - Winter - Green Hubbard
Plant non-GMO, heirloom Green Hubbard Squash Seeds from True Leaf Market to enjoy sweet-tasting winter squash that weighs up to 12 lbs. A great variety for winter storage, the Green...
Squash Seeds - Winter - Gold Nugget
Gold Nugget Winter Squash Seeds. 95 Days to maturity. Non-GMO, heirloom, open pollinated squash seeds. Cucurbita maxima. AKA: Golden Nugget Squash, Oriental Pumpkin. Originally bred as a replacement for sweet...
Watermelon Seeds - Giant - Florida Giant
90 Days to maturity. Citrullus lanatus. Florida Giant Watermelon Seeds. Non-GMO, annual, open-pollinated, heirloom, heat tolerant, seeded, giant watermelon. The Florida Giant watermelon, AKA: Cannon Ball Watermelon, was developed in...
Stock Flower Seeds - Harmony Mix
77-84 Days to maturity. Matthiola incana. Harmony Mix Stock Seeds. Non-GMO, annual, open-pollinated, cold tolerant. Harmony Mix Stock seeds grow fantastically compact and exceptionally fragrant stock flowers that are sure...
Okra Seeds - Star of David - Organic
Organic Star of David Okra Seeds. 60 - 75 days to maturity. Abelmoschus esculentus. Heirloom, Non-GMO, Annual. An Israeli variety, Star of David grows 8 to 10 feet tall stalks....
Melon Seeds - Cantaloupe - Ball 2076 Hybrid
85 Days to maturity. Cucumis melo. Ball 2076 Hybrid Cantaloupe Melon Seeds. A non-GMO, annual, hybrid, heat-tolerant Cantaloupe Melon. Suitable for growing in garden plots, raised beds, and greenhouses. Resistant...
Alternative Lawn Seeds - Wildflower Seeds Mix
The Alternative Lawn Wildflower Seed Mixture was developed for use as a flowering lawn or low-growing ground cover. It is an attractive mixture of fine fescues, flowers, and clovers and...
Basil Seeds - Lime
Non-GMO, Heirloom Lime Basil Herb Seed from True Leaf Market. Ocimum americanum. As basil has many different types, Lime Basil is a sweet cultivar that grows round bright-green leaves with...
Angelonia Seeds - Serena (Pelleted)
91-98 Days to maturity. Angelonia angustifolia. Serena Angelonia Seeds. Non-GMO, annual, hybrid flower. Serena Angelonia seeds grow some of the most elegant yet durable flowers in any garden. Native to...
Bean Seeds - Bush - Red Chili (Organic)
75-100 Days to maturity. Phaseolus vulgaris. Red Chili Bean Seeds (Organic). Non-GMO, annual, open-pollinated, organic, heirloom, bush, shelling bean. Suitable for growing in containers, garden plots, raised beds, and greenhouses....
Tomato Seeds - Salad - Indigo Rose
75-80 Days to maturity (from transplant). Solanum lycopersicum. Indigo Rose Tomato Seeds (PVP 201100302). Non-GMO, annual, open-pollinated, heirloom, indeterminate, salad tomato. Suitable for growing in garden plots, raised beds, and...
Melon Seeds - Cantaloupe - Tuscany
78 Days to maturity. Cucumis melo. Tuscany Cantaloupe Melon Seeds. A non-GMO, annual, open-pollinated, heirloom, heat-tolerant Cantaloupe Melon. Suitable for growing in garden plots, raised beds, and greenhouses. The Tuscany...
Tomato Seeds - Slicing - Floradade
74 Days to maturity (from transplant). Solanum lycoperscium. Floradade Tomato Seeds. Non-GMO, annual, open-pollinated, heirloom, determinate, heat tolerant, slicing tomato. Suitable for growing in garden plots, raised beds, and greenhouses....
Pumpkin Seeds - Kentucky Field
Cucurbita moschata (113 days) Kentucky Field Pumpkin Seeds. Fruits can be variable in shape, normally deeper/longer than they are wide. Kentucky Field generally weights between 10-15 pounds. The skin is...
Tomato Seeds - Slicing - Husky Red Hybrid
78 Days to maturity (from transplant). Solanum lycopersicum. Husky Red Hybrid Tomato Seeds. Non-GMO, warm season annual, F1 hybrid, potato leaf, indeterminate, slicing tomato. Suitable for growing in garden plots,...
Squash Seeds - Winter - Honeynut (Organic)
80-120 Days to maturity. Cucurbita moschata. Organic Honeynut Winter Squash Seeds. Non-GMO, open-pollinated, organic. Honeynut is a smaller, sweeter cousin of the butternut squash, bred for concentrated flavor and convenient...
Watermelon Seeds - Picnic - Golden Honey
85-88 Days to maturity. Citrullus lanatus. Golden Honey Watermelon Seeds. Non-GMO, annual, open-pollinated, heirloom, heat tolerant, seeded, picnic watermelon. Golden Honey is a sweet and sugary treat. This 10 by...
Squash Seeds - Chirimen
Cucurbita moschata (91 days) 4 g Packet of Heirloom Seeds. Musser Seed Company of Los Angeles introduced this squash in 1922. A Japanese Yokohama type squash. Chirimen is bronze-orange in...
Basil Seeds - Sweet (Organic)
60-90 Days to maturity. Ocimum basilicum. Organic Sweet Basil Seeds. Non-GMO, annual, organic, open-pollinated, heirloom. Suitable for growing in fields, containers, garden plots, raised beds, and greenhouses. Sweet basil has...
Tomato Seeds - Slicing - Black From Tula
75-85 Days to maturity (from transplant). Solanum lycopersicum. Variety name Tomato Seeds. Non-GMO, annual, open-pollinated, heirloom, indeterminate, slicing tomato. Suitable for growing in garden plots, raised beds, and greenhouses. Produces...
Pumpkin Seeds - Montana Jack
Cucurbita pepo (90 days) Montana Jack was created by famed plant breeder John Navazio. This pumpkin was selected by John to be an early maturing variety making it great for...
Cucumber Seeds - Summer Top - Hybrid
55-70 Days to maturity. Cucumis sativus ‘Summer Top’. Summer Top Cucumber Seeds. Warm-season annual hybrid.This excellent burpless hybrid cucumber is easy to grow and delivers a large yield of top-grade...
Basil Seeds - Licorice
Non-GMO, Open-pollinated, Heirloom Licorice Basil Herb Seed from True Leaf Market. Ocimum basilicum is native to various Asian regions. As basil has many different varieties, Licorice Basil Herb is considered...
Squash Seeds - Dark Green Zucchini
Cucurbita pepo (45-65 days) Dark Green Zucchini is an early vigorous bush zucchini with straight, smooth, dark-green mottled fruits. Tastiest at 6-8" with pale greenish-white, firm flesh. Dark Green zucchini...
China Aster Seeds - Colour Carpet Mix
60-90 Days to maturity. Callistephus chinensis. Colour Carpet China Aster Seeds. Non-GMO, ornamental, annual, open-pollinated flower. Colour Carpet China Aster flower garden seeds grow an adorable dwarfed aster plant ideal...
Cucumber Seeds - Painted Serpent (Organic)
63 Days to maturity. Cucumis melo. Organic Painted Serpent Cucumber Seeds. Non-GMO, annual, organic, open-pollinated, heirloom, monoecious, slicing cucumber. Suitable for growing in fields, containers (with support), garden plots, raised...
Squash Seeds - Ebony Acorn
Cucurbita pepo (90 days) Ebony Acorn is a delicious dark acorn-type squash that is early and second only in flavor to Hubbard. Prolific 8' vines produce 1.5-2 pound fruits that...
Tomato Seeds - Slicing - Great White
80 Days to maturity (from transplant). Solanum lycopersicum. Great White Tomato Seeds. Non-GMO, warm season annual, open-pollinated, heirloom, indeterminate, slicing tomato. Suitable for growing in garden plots, raised beds, and...
Cucumber Seeds - Summer Dance - Hybrid
55-70 Days to maturity. Cucumis sativus ‘Summer Dance’. Summer Dance Cucumber Seeds. Warm-season annual hybrid. Non-GMO. Best known for its extremely uniform fruit, this hybrid grows vigorously and delivers a...
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