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]()
Rosemary Seeds
2nd year maturity. Rosemary Culinary Herb Seeds. Salvia rosmarinus. Non-GMO. Heirloom. A woody and cold-hardy perennial known to live 15-20 years, culinary rosemary is one of the most persistent and...
Cilantro Seeds - Slow Bolt (Organic)
Non-GMO, Heirloom Organic Slow Bolt Cilantro Herb Garden Seed from True Leaf Market. Coriandrum sativum. Cilantro is native to regions in North Africa and West Asia. As a cool-season ancient...
Basil Seeds - Italian Large Leaf
60-90 days. Italian Large Leaf basil seeds. Ocimum basilicum. Non-GMO. Open Pollinated. Giant green shiny leaves full of seasonal aroma that just makes your mouth water, Italian Large Leaf is...
Peppermint Seeds
90 Days. Peppermint Culinary Herb Seeds. Mentha sp. Non-GMO. A deliciously versatile and bright herb, peppermint seeds are a naturally occurring hybrid between culinary spearmint and watermint. Grown very similar...
Cilantro Seeds - Slow Bolt
Non-GMO, Heirloom Slow Bolt Cilantro Herb Garden Seed from True Leaf Market. Coriandrum sativum. Cilantro is native to regions in North Africa and West Asia. As a cool-season herb dating...
Basil Seeds - Italian Large Leaf (Organic)
Organic Italian Large Leaf basil seeds are a staple to any thriving Organic herb garden. A member of the sweet basil varieties, ocimum basilicum is easily the most common basil...
Lemongrass Seeds - West Indian
90-100 days. West Indian Lemongrass Culinary Herb Seeds. Cymbopogon citratus. Non-GMO. Heirloom. West Indian lemongrass seeds grow the edible, tender, and delicious cultivar of lemongrass. Not to be confused with...
Arugula Seeds - Slow Bolt (Organic)
40-45 days. Organic Slow Bolt Arugula herb Seeds. Eruca vesicaria sativa. Non-GMO. Organic Slow Bolt arugula seeds are one of the fastest growing crops for home gardeners and, since they...
Oregano Seeds - Common Italian
Origanum vulgare 90 days. Perennial. Non-GMO, Heirloom Common Italian Oregano Herb Garden Seed from True Leaf Market. Common Italian Oregano is a perennial herb often called "Wild Marjoram." With the...
Dill Seeds - Bouquet (Organic)
Non-GMO, Heirloom Organic Bouquet Dill Herb Garden Seed from True Leaf Market. Anethum graveolens. Organic Bouquet Dill grows fast-maturing cool-season annuals and is native to West Asia and regions in...
Oregano Seeds - Common Italian (Organic)
90 days. Organic Oregano Culinary Herb Seeds. Origanum vulgare. Perennial. Non-GMO. Organic culinary oregano seeds deliver one of the more pronounced, robust, aromatic herbs in the mint family. Tenacious and...
Lavender Seeds - Common English (aka Vera)
2nd Year Maturity. Non-GMO, Heirloom Common English Lavender Herb Garden Seed from True Leaf Market. Also known as Vera Lavender. Lavandula angustifolia. Lavender is a flowering perennial herb, native to...
Lemon Balm Seeds
Melissa officinalis Perennial. Non-GMO, Heirloom Lemon Balm Herb Garden Seed from True Leaf Market. Melissa officinalis. Lemon Balm resides in the mint family and is native to regions in West...
Chamomile Seeds - German
Non-GMO, Heirloom German Chamomile Herb Garden Seed from True Leaf Market. Matricaria chamomilla. German Chamomile plants originated in Western Asia and were later cultivated in Europe, where chamomile has been...
Borage Herb Seeds
60-70 Days. Borage Culinary Herb Seeds. Borago officinalis. Non-GMO. Heirloom. Borage seeds are grown as both an indoor culinary herb and an open-pollinated garden herb. Non-GMO Borage seeds produce some...
Common Thyme Seeds (Organic)
Certified Organic. Non-GMO. Perennial. 85 days. Non-GMO, Heirloom Organic Common Thyme Herb Garden Seed from True Leaf Market. Genus Thymus. Common Thyme is a cold hardy perennial that grows as...
Spearmint Seeds
50-70 Days to maturity. Mentha spicata. Spearmint Seeds. Non-GMO, perennial, open-pollinated, heirloom. Suitable for growing in fields, containers, garden plots, raised beds, and greenhouses. Enjoy the vibrant, fruity aroma of...
Basil Seeds - Genovese
60-90 days. Genovese basil seeds. Ocimum basilicum. Non-GMO. Open Pollinated. Genovese is a sweet basil heirloom native to the Italian provinces of Genoa, Savona, and Imperia; while locals are decided...
Chives Seeds (Organic)
60 days. Organic Chives Culinary Herb Seeds. Allium schoenoprasum. Perennial. Non-GMO. A member of the onion family along with garlic and leeks, Organic chives are a smaller, more tubular relative...
Sage Seeds - Broad Leaved
Salvia officinalis Perennial. 75 days. Non-GMO, Heirloom, Open Pollinated Broad Leaved Sage Herb Garden Seed from True Leaf Market. Salvia officinalis. Sage plants are warm perennials native to the Meditteranean....
Arugula Seeds - Slow Bolt
40-45 days. Eruca vesicaria sativa. Non-GMO. Herb. Annual. Non-GMO Slow Bolt arugula seeds are one of the fastest-growing crops available to home gardeners and, since they are slower to bolt,...
Sage Seeds - Broad Leaved (Organic)
Salvia officinalis. Certified Organic. Perennial. 75 days. Non-GMO, Heirloom, Open Pollinated Organic Broad Leaved Sage Herb Garden Seed from True Leaf Market. Salvia officinalis. Sage plants are warm evergreens that...
Thyme Seeds - Common
2nd year maturity. Common Thyme Culinary Herb Seeds. Thymus vulgaris. Non-GMO. Popularly known as English thyme to differentiate between the many varieties, Common thyme seeds are one of the hardiest,...
Echinacea - Purple Coneflower Seeds
2nd Year maturity. Echinacea purpurea. Purple Coneflower Seeds. Non-GMO, Heirloom, Perennial. Echinacea grows as a warm-season perennial and flowering herb native to Eastern North America. These wildflowers are popular, as...
Moringa Seeds
160-170 Days to maturity. Moringa oleifera. Moringa Seeds. Non-GMO, Perennial, Deciduous Softwood Tree. Moringa is also known as the Drumstick Tree, Horseradish Tree, and Ben Oil Tree. It is enjoyed...
Dill Seeds - Bouquet
65 Days to maturity. Anethum graveolens. Bouquet Dill Seeds. Non-GMO, annual, open-pollinated, heirloom. Suitable for growing in fields, containers, garden plots, and raised beds. 3-foot plant with strongly aromatic foliage,...
Basil Seeds - Genovese (Organic)
60-90 days to maturity. Ocimum basilicum. Organic Genovese Basil Seeds. Non-GMO, annual, organic, open-pollinated, heirloom. Suitable for growing in fields, containers, garden plots, raised beds, and greenhouses. Vigorous, tall-growing, large-leaved...
Peppermint Seeds (Organic)
Perennial herb garden seeds. Certified Organic by Oregon Tilth. Non-GMO, Heirloom Peppermint Herb Garden Seed from True Leaf Market. Mentha sp. Peppermint plants are cool perennial and hybrid mints native...
Parsley Seeds - Dark Green Italian Flat-leaf
Petroselinum crispum Annual. 72 days. Non-GMO, Heirloom Dark Green Italian Flat Leaf Parsley Herb Garden Seed from True Leaf Market. Petroselinum crispum. Italian Parsley plants are hardy biennials often grown...
Chives Seeds - Garlic
85-90 Days to maturity. Allium tuberosum. Non-GMO, heirloom Garlic Chives Herb Garden Seed. Chives are native to regions in Asia and Europe. Garlic chive cultivars are also called "Chinese Chives"...
Stevia Seeds - Sweet Herb
40 to 60 days. Stevia rebaudiana Annual in cold climates. 40 to 60 days. Non-GMO, Heirloom Sweet Stevia Herb Garden Seed from True Leaf Market. Stevia rebaudiana. Stevia is a...
Catnip Seeds
Up to 85 days. Foliage is greenish-gray with small blue flowers. Dried leaves can be used for tea and as a stimulant for cats. Small bilabiate blooms can be white,...
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