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]()
Yellow Pea - Organic - Sprouting Seeds
2-4 Days. Pisum sativum. Sprouting. High Germination. Organic. A popular variation to the traditional green pea, Organic yellow pea sprouting seeds offer a bright and colorful substitution. Non-GMO Organic yellow...
Kale - Dwarf Siberian - Microgreens Seeds
Up to 12 days. This cold-hardy microgreen is perfect for growing indoors throughout the winter. It is a mildly sweet and nutty microgreen that may even inherit sweetness from colder...
Zucchini Seeds - Caserta
Cucurbita pepo (65 days) An early bush cocozelle zucchini that produces huge yields of 16" fruit. Much better eaten at the 6-8" size. Zucchini Seeds - Caserta Light green skin...
Morning Glory Seeds - Heavenly Blue
112 days. Heavenly Blue morning glory seeds promise a fun, unique, and effortless grow for your home, garden, or patio. Heavenly Blue seeds burst into 60-120" tall morning glories dazzling...
Vinca Seeds - Mediterranean XP Series
98-105 Days to maturity. Catharanthus roseus ’Mediterranean XP Series’. Mediterranean XP Series Vinca Seeds. Non-GMO, open-pollinated, annual. Premium Quality Seeds. Mediterranean XP vinca seeds grow one of summer's most exciting...
Cress Seeds - Curled (Organic)
Non-GMO, Heirloom Organic Curled Cress Herb Garden Seed from True Leaf Market. Lepidium sativum. Cress is native to Persia, which is known as West Asia. Organic Curled Cress is herbaceous...
Okra Seeds - Jambalaya 2.0
Jambalaya 2.0 Okra Seeds. Abelmoschus esculentus. 55 to 58 Days to Maturity. Non-GMO, F2 Hybrid. Annual. This extra early maturing okra variety is very compact and has small leaves. It...
Watermelon Seeds - Picnic - Cal Sweet
90 Days to maturity. Citrullus lanatus. Cal Sweet Watermelon Seeds. Non-GMO, annual, open-pollinated, heirloom, heat tolerant, seeded, Picnic watermelon. Cal Sweet Watermelon fruits typically weigh 20 to 25 pounds with...
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...
Radish - Champion - Microgreens Seeds
6 to 11 days. A tasty microgreens with vibrant pink stems and deep earthy-green leafy tops. Champion is an unexpected radish microgreen gem. Select a Different Use for This Seed:...
Watermelon Seeds - Mini - Cal Sweet Bush AAS
90 Days to maturity. Citrullus lanatus. Cal Sweet Bush AAS Watermelon Seeds. Non-GMO, annual, open-pollinated, heirloom, heat tolerant, seeded, Mini watermelon. Suitable for growing in garden plots and large containers...
Tray Insert - 48 Cell - 12x4 Nested
Made from BPA free polystyrene, each sheet of these seed starter greenhouse tray inserts has 48 planting pots configured in 12 groups of 4 . Each 4 pot section has...
Heirloom Sunflower Seed Collection - 5 Pack
90 - 110 days. Growing 5 Varieties of sunflower seeds is the easiest and most economical way to bring bold, vibrant, and diverse pairings of color at a discounted price....
Pak Choi Seeds - Hotau Hybrid
30-35 days to maturity.Brassica rapa var chinensis. Hotau Hybrid Pak Choi Chinese Cabbage Seeds. Non-GMO, warm or cool-season annual, hybrid. Mini type pak choi, 8-10cm (3-4 inches), uniform, wide and...
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...
Yellow Mustard Microgreens Seeds
Yellow Mustard Microgreens Seeds. Non-GMO, Open Pollinated. Yellow Mustard Microgreens mature in 7 to 10 days, from seed to harvest. Grow as you would any other mustard seeds. Yellow mustard...
Sunflower Seeds - Teddy Bear
50-65 Days to maturity. Helianthus annuus. Teddy Bear Sunflower Seeds: Non-GMO. Open Pollinated. Ornamental. Annual. Teddy Bear sunflower seeds grow one of the most unique, lush, and brilliant blooms of...
Pea Seeds - Snap - Cascadia (Organic)
Non-GMO Organic Cascadia Snap Pea seeds are ready in 65 days. These snap peas are a dwarf variety that do not need staking. Stringless pods are 3 inches long with...
Amaranth (Organic) - Microgreens Seeds
8-12 days. Certified Organic. Microgreens Seeds.The translucent green color of micro Amaranth makes a great garnish or addition to any salad. Amaranth is a little more challenging and grows poorly...
Bean Seeds - Bush - Stringless Green Pod (Burpee)
Up to 50 days. Formerly Burpee Stringless. Crisp pods are 5 to 6 inches long, slightly curved and entirely stringless. Dependable producer, even under adverse conditions! Each plan50-55 Days to...
Gaillardia Seeds - Blanket Flower
84-91 Days to maturity. Gaillardia aristata. Gaillardia Blanket Flower Seeds. Non-GMO, Perennial. Blanket Flower gaillardia seeds promise a vibrant and perennial touch of authentic American color in your garden. Blanket...
Okra Seeds - Star Of David
Abelmoschus esculentus (60-65 days) Star of David okra is an old Israeli heirloom that has a unique six-pointed, geometric star shape resembling the Star of David. ~400 seeds/oz. Okra Seeds...
Pumpkin Seeds - White Queen
90-120 days. Non-GMO. Open-pollinated. White Queen Pumpkin Seeds from True Leaf Market grow ghostly white pumpkins that reach 7" to 10" in diameter. Ornamental white pumpkins like White Queen can...
Sunflower Seeds - Red Sun
90-110 Days to maturity. Helianthus annuus. Red Sun Sunflower Seeds: Non-GMO. Open Pollinated. Ornamental. Annual. Heirloom. Red Sun seeds grow one of the summer's rarest and most unique blooms, stunning...
Tomato Seeds - Slicing - Black Russian
80-85 Days to maturity (from transplant). Solanum lycopersicum. Black Russian Tomato Seeds. Non-GMO, annual, open-pollinated, heirloom, indeterminate, slicing tomato. Suitable for growing in garden plots, raised beds, and greenhouses. This...
Morning Glory Seeds - Mixed Colors
112 Days to maturity. Ipomoea purpurea. Mixed Colors Morning Glory Seeds. Non-GMO, annual. Morning glory seeds are an essential and decorative plant for your summertime garden, home, or patio. Annual...
Lentil - Black (Organic) - Sprouting Seeds
2-3 Days to Harvest. Vigna mungo. Unhulled Organic Black Lentil Sprouting Seeds. Organic. Non-GMO. Sprouting. High Germination. Lentil is the ideal beginner sprout and a great way to introduce anyone...
Onion Seeds - Bunching - Kyoto Kujo Negi
80 Days to maturity. Allium fistulosum. Kyoto Kujo Negi Japanese Bunching Onion Seeds. Non-GMO, perennial, open-pollinated, heirloom, bunching onion. Suitable for growing in greenhouses, garden plots, raised beds, and containers....
Lettuce Seeds - Romaine / COS - Dark Green Cos
65-70 days. Dark Green COS Romaine Lettuce Seeds. Lactuca sativa. Non-GMO. Open Pollinated. Its dark green leaves are long, narrow, and very crisp. The leaves are dark green in color...
22 x11 Perma-Nest Planting Trays
These heavy-duty, polystyrene, plant trays measure 22"x11" and have no drain holes. They are perfect drip trays for growing microgreens, wheatgrass or for use as a greenhouse drip tray. Click...
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