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]()
Tomatillo Seeds - Cape Gooseberry Large Fruit
90-120 days. Physalis peruviana. Cape Gooseberry Large Fruit Tomatillo Seeds. Non-GMO, warm-season annual, heirloom, open-pollinated. This crop is suitable for garden plots, raised beds, and larger containers. This strain will...
Chinese Toon Seeds - North Red
40-50 Days to maturity. Toona sinensis A. juss. Chinese Toon Seeds - North Red. Heirloom, Non-GMO. Purple type. Vigorous growing. Keep the seeds in a cool and dry place. However,...
Kale Seeds - Ethiopian
50 to 60 Days to maturity. Brassica carinata. Ethiopian Kale Seeds. Annual, Heirloom. This leafy green originated in Ethiopia, in East Africa. It is known by various names, including Ethiopian...
Oats and Peas Cover Crop Seed Mix (Organic)
50-70 Days to termination. Organic Oat and Peas Cover Crop Mix Seeds. Non-GMO, organic, annual, winter-killing, no-till, forage-friendly. Plant as a spring, summer, or fall cover crop to enjoy the...
Pepper Seeds - Sweet - Giant Marconi Hybrid
72 Days to maturity (from transplant). Capsicum annuum. Giant Marconi Hybrid Pepper Seeds. Non-GMO, annual, F1 hybrid, 2001 AAS winner, sweet pepper with no heat. 0 Scoville Heat Units. Suitable...
Tomato Seeds - Paste - San Marzano Indeterminate (Organic)
85 Days to maturity (from transplant). Solanum lycoperscium. San Marzano Indeterminate (Organic) Tomato Seeds. Non-GMO, annual, open-pollinated, organic, heirloom, indeterminate, paste tomato. Often compared to the famous Roma tomato in...
Sorrel Seeds - Garden Large Leaf (Organic)
50-60 Days to maturity. Rumex acetosa. Organic Garden Large Leaf Sorrel Seeds. Non-GMO, perennial, organic, open-pollinated, heirloom. Suitable for growing in fields, containers, garden plots, and raised beds. Enjoy a...
Achillea Seeds - Summer Pastels Mix
2nd-year maturity. Achillea millefolium. Summer Pastels Achillea Seeds. Non-GMO, Open-pollinated, Perennial. Achillea Summer Pastels Mix seeds are brilliant, easy to grow, and renowned for their tolerance to thrive where other...
Market Garden Seeds Collection
The Market Garden Seeds Collection delivers 8 of the most productive and reliable crops to help boost any Farmers‚ Market stand all season long. Market Garden Seeds Collection is handpicked...
Mustard - Tat Soi - Black Knight
Tat Soi - Black Knight Mustard Seeds. 45 - 55 days to maturity. Heirloom, Annual. Can be grown in containers. Can be grown as microgreens. Brassica rapa. A dark green...
Coco Coir Fiber - 10x20 Hydroponic Grow Mats
All-natural coconut coir fiber is plentiful and sustainable. Woven into sheets and cut to fit standard 1010 or 1020 nursery trays, coco coir makes a great growing medium for microgreens,...
Broccoli Seeds - Chinese Broccoli - Early Jade - Hybrid
40-50 days to maturity. Brassica oleracea var alboglabra ‘Early Jade’. Early Jade Chinese Broccoli Seeds. Non-GMO, Hybrid, Cool-season Annual. Closely related to European cabbage, Chinese Broccoli was introduced to China...
Organic Heirloom Seed Assortment - 10 Pack
The Organic Vegetable Seed Collection includes 10 current crop year vegetable garden seeds. This selection of heirloom, non-GMO seed varieties includes: Broccoli, Basil, Watermelon, Cilantro, Carrot, Kale, & More. BONUS...
French Marigold Seeds - Dainty Marietta
50-65 Days to maturity. Tagetes patula' Dainty Marietta'. Dainty Marietta French Marigold Seeds. Non-GMO, annual, open-pollinated. This drought-tolerant French Dwarf Marigold is truly one of a kind. The striking yellow...
Chinese Leek Seeds - Flowering
65-75 days to maturity. Allium tuberosum ‘Flowering’. Flowering Chinese Leek Seeds. Non-GMO, cool-season perennial heirloom. This popular Chinese specialty herb is a vigorous perennial. It is grown for its young...
Squash Seeds - Summer - Zucchini Greyzinni Hybrid
50 days. High-yielding, 5 to 6 inch, attractive heavily striped, light green-grey zucchini with fine eating quality and creamy, sweet flavor. These somewhat blocky fruits have a slight taper. Open-spaced...
Micro Punnet Tray - Microgreens
These single serving growing trays measure approximately 2" by 3" and are 2" high. They are designed to work perfectly with 2x3" Micro Mat 2x3" Hydroponic Grow Pads. Designed to...
Hypoestes Seeds - Splash Select Series
74-84 Days to maturity. Hypoestes phyllostachya. Splash Select Series Hypoestes Seeds. Non-GMO, annual, open-pollinated flower seeds. Splash Select Series Hypoestes are adorable, colorful foliage for shaded areas. Also known as...
Alyssum Seeds - Easter Bonnet Series
63-77 Days to maturity. Lobularia maritima. Easter Bonnet Series Alyssum Multi-seed Pelleted Seeds. Non-GMO, Open-Pollinated, Annual. Open-pollinated, multi-pelleted seeds. Easter Bonnet Series Alyssum seeds promise delicate and early spring blooms...
Swiss Chard Seeds - Orange
55 days. Orange Swiss Chard is a great ornamental vegetable. Don't just plant it in the garden, add some in the landscaping. These bright orange stalks will spice up any...
Pepper Seeds - Hot - Pasilla Bajio
80-89 Days to maturity (from transplant). Capsicum annuum. Pasilla Bajio Pepper Seeds. Non-GMO, annual, open-pollinated, heirloom, heat tolerant, hot-type pepper with mild heat levels. 1,000 to 2,500 Scoville Heat Units....
Cabbage Seeds - Green Express
50 days. Brassica oleracea. Heirloom Green Express Cabbage Seeds. Non-GMO, open-pollinated, annual. Green Express delivers full cabbage flavor in a fraction of the space and time, forming dense, tennis-ball to...
Tomato Seeds - Cherry - Chadwick Cherry (Organic)
70 to 90 Days to maturity (from transplant). Solanum lycoperscium. Tomato - Chadwick Cherry Tomato Seeds. Non-GMO, annual, organic, open-pollinated, heirloom, indeterminate cherry tomato. Suitable for growing in garden plots,...
Endive Seeds - Broadleaf Batavian
85 days. Escarole type. Broad, slightly twisted outer leaves form around 12 to 16 inch, tight-packed heads. Very deep heart is well blanched, creamy-white, and buttery. Approx. 16,830 seeds/oz. Download...
Fennel Seeds - Sweet
90-115 days. Foeniculum vulgare var. azuricum. Sweet Fennel Seeds. Non-GMO, annual, heirloom, open-pollinated. This early strain is suitable for garden plots, raised beds, and containers. Sweet Fennel is a cool-bulbing...
Tomato Seeds - Slicing - Marianna's Peace
75-85 Days to maturity (from transplant). Solanum lycopersicum. Marianna's Peace Tomato Seeds. Non-GMO, warm season annual, open-pollinated, heirloom, indeterminate, slicing tomato. Suitable for growing in garden plots, raised beds, and...
Sunflower Seeds - Lemon Queen
80-100 Days to maturity. Helianthus annus. Lemon Queen Sunflower Seeds. Non-GMO, open-pollinated, heirloom, annual, multi-branching sunflower. This bright sunflower features light, lemony petals and a light brown center that demands...
Pepper Seeds - Sweet - Jimmy Nardello
80-90 Days to maturity (from transplant). Capsicum annuum. Organic Jimmy Nardello Pepper Seeds. Non-GMO, annual, organic, open-pollinated, heirloom, sweet pepper with mild heat levels. 0 to 100 Scoville Heat Units....
Dog & Cat Pet Grass Kit
This pet / ornamental wheat grass kit is perfect for decorative growing or providing vital nutrients to your pets, and may also prevent them from eating your houseplants. Dogs &...
Fennel Seeds - Bronze
Non-GMO, Heirloom Bronze Fennel Herb Garden Seed from True Leaf Market. Foeniculum vulgare purpureum. Bronze Fennel is a cool perennial that's been used as medicine dating back to Ancient Egypt....
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