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]()
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...
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...
Crimson Clover - Cover Crop Seeds
70-90 Days. Trifolium incarnatum. Cover Crop. Non-GMO. Annual. Heirloom crimson clover seeds are an ideal annual garden companion and cover crop for plants and soils deficient in nitrogen. Use 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...
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...
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...
Collards Seeds - Georgia Southern
70 days. Georgia Southern Collard seeds grow cabbage like dark green leaves, with a slightly crumpled texture. These collard leaves are huge and juicy, making them excellent for salads and...
White Dutch Clover - Cover Crop Seeds
70-90 Days. Trifolium repens. Non-GMO. Cover Crop. Perennial. Open-pollinated White Dutch clover seeds produce a cover crop for gardens lacking in nitrogen and productivity. Non-GMO White Dutch clover seeds quickly...
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....
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...
Crimson Clover - Organic - Cover Crop Seeds
70-90 Days. Trifolium incarnatum. Organic. Cover Crop. Non-GMO. Heirloom Organic crimson clover seeds are an ideal annual garden companion and cover crop for plants and soils deficient in nitrogen. Use...
Barley - Whole (Organic) - Grass Seeds
Barley grass sprouting seed, with the hull on (whole barley). Great germination rate and a great seed for sprouting, growing barleygrass and more. Grows healthy, thick bladed barley grass for...
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...
Chives Seeds
Non-GMO, Heirloom Chives Herb Garden Seed from True Leaf Market. Allium schoenoprasum. Chives are native to regions in Asia and Europe. This Chive cultivar is common in the U.S. and...
Thai Basil Seeds - Siam Queen
Non-GMO, Heirloom Siam Queen Thai Basil Herb Seed from True Leaf Market. Ocimum basilicum. As basil has many different types, Siam Queen Thai Basil is a sweet cultivar that originated...
Anise Seeds
Non-GMO, Open-pollinated, Heirloom Anise Herb Seeds from True Leaf Market®. Pimpinella anisum is native to the Mediterranean and Southeast Asia regions. The Anise herb and seeds, known as Aniseed, have...
Shiso Herb Seeds (Perilla) - Korean
70 days to maturity. Perilla frutescens var. frutescens. Korean Shiso Herb Seeds (Perilla). Warm season annual. Perilla is a lovely Korean herb that is a vivid green on the top...
Basil Seeds - Lemon
Non-GMO, Lemon Basil Herb Seed from True Leaf Market. Ocimum basilicum x citriodorum is native to India. As basil has many different varieties, Lemon Basil Herb is considered non-sweet and...
Broccoli Seeds - Green Sprouting Calabrese
brassica oleracea var. capitata (60-90 days) Start Green Sprouting broccoli early in the season and by early summer you will have tons of sweet broccoli. Harvest the central head then...
Basil Seeds - Green Leaf Holy Basil
65-75 days maturity. Ocimum sanctum. Green Leaf Holy Basil Seeds. Non-GMO, Heirloom. Annual. Holy basil is an essential herb in the Thai kitchen due to its unique flavor. It is...
Tomatillo Seeds - Toma Verde
70 days. Physalis ixocarpa. Toma Verde Tomatillo Seeds. Non-GMO, annual, heirloom, open-pollinated. This crop is suitable for containers, garden plots, raised beds, and fields. Early, prolific green tomatillo with flat-round...
Shiso Herb Seeds (Perilla) - Green
Non-GMO, Heirloom Green Shiso Perilla Herb Garden Seed from True Leaf Market. Perilla frutescens var. crispa. Green Shiso is a warm annual and beefsteak variety. Green Shiso, also known as...
Shiso Seeds (Perilla) - Green Ohba
60 to 70 days to maturity. Perilla frutescens var crispa. Shiso Herb Seeds (Perilla) - Green Ohba Shiso Seeds. Warm season annual. Shiso, also known as perilla or beefsteak leaf,...
Collards Seeds - Vates
75 days. Vates Collard Seeds grow, slick and somewhat crumpled leaves on vigorous spreading plants. Their leaves are dark green with pale green veins. These collard plants are slow bolting...
Broccoli Seeds - Di Cicco
Brassica oleracea (50-70 days) Di Cicco is an Italian heirloom broccoli dating from 1890. Di Cicco broccoli is very vigorous, emerald green, producing nice central heads 3-5" wide. Approx. 9,000...
Cauliflower Seeds - Cheddar Hybrid
70-75 days. This beautiful orange cauliflower boasts uniform, smooth, firm heads. Leave heads untied for maximum color intensity. Roasting enhances the flavor of cheddar cauliflower. In warm growing areas, plant...
Parsley Seeds - Italian Giant (Organic)
70-80 Days to maturity. Petroselinum crispum. Organic Italian Giant Parsley Seeds. Non-GMO, annual, organic, open-pollinated, heirloom. Suitable for growing in fields, containers, garden plots, raised beds, and greenhouses. Italian Giant...
Spinach Seeds - Red Malabar
70 days. Basella rubra. Red Malabar Spinach Seeds. Non-GMO, warm-season annual, heirloom, open-pollinated. This crop is suitable for trellised garden plots, raised beds, and large containers. Red Malabar is a...
Italian Dandelion Seeds
Non-GMO, Heirloom Italian (Chicory) Dandelion Herb Garden Seed from True Leaf Market. Cichorium intybus. This is a tender perennial that originates from Italy and isa type of chicory or endive....
Cauliflower Seeds - Snowball Y Improved - Organic
Brassica oleracea (70-80 days) Snowball Y improved was Introduced by Ferry-Morse Seed Company in 1947. It was developed from "Snowball" cauliflower which was around in 1884. Tasty snow white 6",...
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