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]()
Lettuce Seeds - Crisphead - Blonde De Paris
50-60 days. Blonde de Paris Batavia 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...
Cress Seeds - Curled (aka Garden, Pepper)
Non-GMO, Heirloom Curled Cress Herb Garden Seed from True Leaf Market. Lepidium sativum. Cress is native to Persia, which is known as West Asia. Curled Cress is herbaceous also known...
Cabbage Seeds - Brunswick
Brassica oleracea (70 days) Introduced 1924. Large drumhead type cabbage. This cold hardy cabbage is perfect for fall/winter growing. Originating in Germany this cabbage makes an excellent sauerkraut that has...
Mustard Seeds - Mizuna Red Leaf
Another great Japanese mustard, especially well suited to microgreen production. The red leaf is not a deeply divided as regular mizuna. Spicy flavor, easy to grow. Approximately 18,000 seeds per...
Burdock Seeds - Chiko
Non-GMO, Heirloom Burdock Chiko Herb Garden Seed from True Leaf Market. Arctium lappa. Burdock biennial herbs originated from regions in Europe and Asia and is a diverse herbal remedy that's...
Turnip Seeds - Gold Ball
Brassica rapa. (70 days) Introduced prior to 1859 and still going strong! This is one turnip you want your garden for its perfectly shaped 3-4" amber globes. Approx. 9,500 seeds/ounce....
Carnation Seeds - Lillipot Mix (Treated)
154-175 days to maturity. Dianthus caryophyllus. Carnation Lillipot Mix Seeds. Non-GMO, Annual, or Biennial. Ornamental. Treated seeds. Lillipot Mix carnation seeds promise a spectacular and fragrant alternative to the traditional...
Swiss Chard Seeds - Rhubarb
55 days. Rhubarb Swiss Chard leaves are a beautiful variety and excellent in the kitchen as well. Recommended by USU. This plant produces dark reddish-green, heavily crumpled leaves, beautiful crimson...
Mustard Seeds - Nemagon
Nemagon is a natural bio-fumigant for root-knot nematode. What is bio-fumigation? Well, there are a lot of big words and some fancy jargon, but it condenses down to this: Bio-fumigants...
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...
Lettuce Seeds - Tango
Lactuca sativa (33 days) Tango is a curled baby leaf variety that has a crisp, clean texture and holds up well with numerous salad dressings. Uniform attractive plants form tight...
Leek Seeds - Giant Musselburgh
80-130 days. Allium porrum. Giant Musselburgh Leek Seeds. Non-GMO, annual, heirloom, open-pollinated. This crop is suitable for garden plots, raised beds, and market gardens. Giant Musselburgh is a classic Scottish...
Mustard Seeds - Summer Fest Komatsuna Hybrid
21 days in summer or 50-60 days in winter to maturity. Brassica rapa var. perviridis. Summer Fest Komatsuna Mustard Seeds. Non-GMO, warm or cold-season, annual, hybrid. This popular traditional Japanese...
Cress Seeds - Upland
Non-GMO, Heirloom Upland Cress Herb Garden Seed from True Leaf Market. Barbarea verna. Upland Cress, also known as "European greens" is native to regions in China. Upland Cress is a...
Lettuce Seeds - Crisphead - Hanson Improved
75-85 days. These non-GMO Hanson Improved lettuce seeds grow into large green leaves and a white heart. Hanson Improved Lettuce is ready to harvest in 80 days. The Hanson Improved...
Dianthus Seeds - Floral Lace Series (Pelleted)
105-112 days to maturity. Dianthus chinensis x barbatus. Dianthus Floral Lace Series Mix Seeds. Non-GMO, Annual, or Biennial. Ornamental. Floral Lace Series dianthus seeds promise a unique, vibrant, and low-maintenance...
Lettuce Seeds - Romaine / COS - Rouge D'Hiver
50-60 days. Rouge D'Hiver Romaine Lettuce Seeds. Lactuca sativa. Non-GMO. Open Pollinated. This well loved French heirloom from the 1800s has been pleasing gardeners with its rich, buttery flavor for...
Spinach Seeds - Seaside - Hybrid
Spinach Seeds - Seaside - Hybrid. Non-GMO. Spinacea oleracea. 25-30 days maturity for baby leaf, 40-60 days to full maturity. Cool season annual. Seaside is a very uniform baby leaf...
Radish Seeds - Shirahime Hatsuka Daikon
22 to 30 Days to maturity. Raphanus sativus. Shirashime Hatsuka Daikon Radish Heirloom Seeds. Cool Season Annual. A uniquely small daikon radish, Shirashime Hatsuka is hardy, quick to harvest, and...
Broccoli Raab Seeds - Sorrento
40 to 50 Days until mautre. Brassica papa afar ruvo. Sorrento Broccoli Raab Seeds. Annual. Heirloom. Non-GMO. Open-pollinated. “Rapini,” is a separate moniker for the flowering Brassica. This is a...
Cauliflower Seeds - Song TJS-65 - Hybrid
55-60 Days in Spring, 65-70 Days in Fall to maturity Brassica oleracea var. botrytis. Cauliflower Seeds - Song TJS-65. Annual, Hybrid. This is a non-GMO seed that has a yellowish...
Broccoli Seeds - Chinese Broccoli - Big Stem
40-50 days to maturity. Brassica oleracea var alboglabra ‘Big Stem’. Big Stem Chinese Broccoli Seeds. Non-GMO; hybrid; cool-season annual. Closely related to European cabbage, Chinese broccoli was introduced to China...
Lentil Seeds - Green - Organic
Organic Green Lentil Seeds. Lens culinaris. 80 to 110 days to maturity. Certified Organic by OTCO. Hardy Annual. Heirloom, Open Pollinated, Non-GMO. Produces light green, or greenish-brown lentils. Sometimes referred...
Pansy Seeds - Halloween II
91-98 Days to maturity. Viola × wittrockiana. Halloween II Pansy Seeds. Non-GMO, open-pollinated, Premium Quality Seeds, annual. Halloween II pansy seeds are a stunning, compact, and "spooky" addition to grow...
Cauliflower Seeds - All Year Round
Non-GMO and Heirloom All Year Round Cauliflower is one of the most straightforward cauliflower varieties. Seed matures in 65 days and produces a large, tight, white head. In many zones,...
Pea Seeds - Snap - Taichung 13
70 days to maturity.Pisum sativum. Taichung 13 Snap Pea Seeds. Non-GMO, cool-season annual, heirloom. This early edible podded snap pea has white flowers. The vines are vigorous and prolific, producing...
Swiss Chard Seeds - Yellow
55 days. The Yellow Swiss Chard is a variety that produces dark green leaves on bright Yellow stems. These stems are excellent as an ornamental piece in the garden, but...
Kale Seeds - Garden Blend
Garden Blend Kale Seeds. 70 - 80 days to maturity. Brassica oleracea. Open-pollinated. Annual. Everyone wants to grow the best of the best in garden performance. Kale Garden Blend's component...
Asparagus Crowns - Spring - Mary Washington
This is a pre-order item and is expected to ship in February to March for spring planting. Other seeds, supplies, or kits ordered with this product may ship separately. This...
Veronica Seeds - Blue Bouquet
98-112 days to maturity. Veronica spicata. Veronica Blue Bouquet Seeds. Non-GMO, Perennial. Ornamental. Blue Bouquet veronica seeds are a perennial favorite and timeless addition to your summer garden, with hardy...
Parsley Seeds - Double Curled
75 Days to maturity. Petroselinum crispum. Double Curled Parsley Seeds. Non-GMO, annual, open-pollinated, heirloom. Suitable for growing in fields, containers, garden plots, raised beds, and greenhouses. Double Curled Parsley is...
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