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]()
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...
Celery Seeds - Golden Self Blanching
Non-GMO Golden Self-Blanching Celery Seeds from True Leaf Market are a stocky, resistant heirloom celery variety. The open-pollinated, upright celery produces thick, string-free stalks that are crisp and rich. As...
Pepper Seeds - Sweet - Shishito (Organic)
60-80 Days to maturity. Capsicum annuum var. grossum. Organic Shishito Sweet Pepper Seeds. Non-GMO, heirloom, open-pollinated, organic, cool weather annual. This thin-skinned and sweet pepper is popular in Asian market....
Strawberry Seeds - Mignonette
Mignonette Strawberry Seeds. Heirloom. Non GMO. Perennial. Fragaria vesca. AKA: Alpine Strawberry or Wild Strawberry. 80-85 days. The French Mignonette strawberry is unlike any you‚ve bought from the grocery store,...
Basil Seeds - Thai (Organic)
60-90 Days to maturity. Ocimum basilicum thyrsiflora. Organic Thai Basil Seeds. Non-GMO, annual, organic, open-pollinated, heirloom. Suitable for growing in fields, containers, garden plots, raised beds, and greenhouses. On the...
Parsley Seeds - Plain or Single
70-80 Days to maturity. Petroselinum crispum. Plain or Single Parsley Seeds. Non-GMO, annual, open-pollinated, heirloom. Suitable for growing in fields, containers, garden plots, raised beds, and greenhouses. Plain or Single...
Shiso Seeds - Red (Organic)
80-85 Days to maturity. Perilla frutescens. Red Shiso Herb Seeds. Non-GMO, organic, annual. Shiso is grown as an annual herb with a distinct flavor often described by people as similar...
Sunflower Seeds - Indian Blanket
75-90 Days to maturity. Helianthus annuus. Indian Blanket Sunflower Seeds: Non-GMO. Open Pollinated. Ornamental. Annual. Indian Blanket blooms gorgeous flowers that are shades of orange, red, and yellow. These beautiful...
Kale Seeds - Portuguese
Portuguese Kale Seeds. Brassica oleracea. 85 days to maturity. Heirloom. Annual. This Kale variety may be the hardiest of the cabbage kin. Approximately 8,000 seeds/ounce Kale Seeds - Portuguese It...
Basil Seeds - Culinary Blend
60-90 Days to maturity. Ocimum basilicum. Culinary Blend Basil Seeds. Non-GMO, annual, open-pollinated, heirloom. Suitable for growing in fields, containers, garden plots, raised beds, and greenhouses. This blend of basil...
Cosmos Seeds - Sea Shells
75-90 Days to maturity. Cosmos bipinnatus. Sea Shells Cosmos Seeds. Non-GMO, annual, open-pollinated. This unique cosmos variety has multiple tubular petals that create a unique and captivating shape. Sea Shell...
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...
Stock Flower Seeds - Harmony Mix
77-84 Days to maturity. Matthiola incana. Harmony Mix Stock Seeds. Non-GMO, annual, open-pollinated, cold tolerant. Harmony Mix Stock seeds grow fantastically compact and exceptionally fragrant stock flowers that are sure...
Basil Seeds - Sweet (Organic)
60-90 Days to maturity. Ocimum basilicum. Organic Sweet Basil Seeds. Non-GMO, annual, organic, open-pollinated, heirloom. Suitable for growing in fields, containers, garden plots, raised beds, and greenhouses. Sweet basil has...
Wildflower Seeds - Cutting Mix (Organic)
50-90 Days to maturity. Cosmos bipinnatus, Lobularia maritima, Zinnia elegans, Centaurea cyanus, and Helianthus annuus. Organic Cut Flower Mix Seeds. Non-GMO, Organic, Annuals. The Organic Cut Flower Mix offers a...
Sunflower Seeds - Earthwalker
75-85 Days to maturity. Helianthus annuus ’Earthwalker’. Earthwalker Sunflower Seeds: Non-GMO, open-pollinated, ornamental, annual, drought-tolerant, heat-tolerant, multi-branching sunflower. Earthwalker sunflower seeds grow deeply colored and complement any outdoor space. These...
Lentil Seeds - Red - Organic
Organic Red Lentil Seeds. Lens culinaris. 80 to 110 days to maturity. Certified Organic by OTCO. Hardy Annual. Heirloom, Open Pollinated, Non-GMO. Used for vegetable gardening and sprouting. Approx 600...
Lentil Seeds - Black (Organic)
Organic Black Lentil Seeds. Lens culinaris. 80 to 110 days to maturity. Certified Organic by OTCO. Hardy Annual. Heirloom, Open Pollinated, Non-GMO. Use for vegetable gardening and sprouting. Produces dark...
Corn Seeds - Golden Bantam 8
75-85 Days to maturity. Zea mays. Golden Bantam 8 Corn Seeds. Non-GMO, annual, open-pollinated, heirloom, Sweet Corn. Golden Bantam 8, a classic heirloom variety, is a testament to its rich...
Tomato Seeds - Cherry - Brad's Atomic Grape
75-80 Days to maturity (from transplant). Solanum lycopersicum. Brad's Atomic Grape Tomato Seeds. Non-GMO, warm season annual, open-pollinated, indeterminate grape tomato. Suitable for growing in garden plots, raised beds, greenhouses,...
Endive Seeds - Sugarloaf
80 days. Cichorium intybus. Sugarloaf Endive Seeds. Non-GMO, annual, heirloom, open-pollinated. This crop is suitable for field, garden plots, raised beds, and containers. This variety produces large, dense, cylindrical heads...
Corn Seeds - Sweet - Abundance Hybrid
70-100 Days to maturity. Zea mays. Abundance Corn Seeds. Non-GMO, annual, F1 hybrid, Sweet Corn. Suitable for growing in garden plots or raised beds. Corn tolerates heat and drought-prone regions....
Pepper Seeds - Hot - Cambuchi
80 Days to maturity (from transplant). Capsicum baccatum. Cambuci Pepper Seeds. Non-GMO, annual, open-pollinated, heirloom, hot pepper with medium heat levels. 4000 to 6000 Scoville Heat Units. Suitable for growing...
Parsley Seeds - Italian Giant
70-80 Days to maturity. Petroselinum crispum. Italian Giant Parsley Seeds. Non-GMO, annual, open-pollinated, heirloom. Suitable for growing in fields, containers, garden plots, raised beds, and greenhouses. Italian Giant parsley brings...
Onion Sets - Spanish Yellow
100 Sets This is a pre-order item and is expected to ship in March to April for spring planting. Other seeds, supplies, or kits ordered with this product may ship...
Onion Sets - Karmen Red
100 Sets This is a pre-order item and is expected to ship in March to April for spring planting. Other seeds, supplies, or kits ordered with this product may ship...
China Aster Seeds - Colour Carpet Mix
60-90 Days to maturity. Callistephus chinensis. Colour Carpet China Aster Seeds. Non-GMO, ornamental, annual, open-pollinated flower. Colour Carpet China Aster flower garden seeds grow an adorable dwarfed aster plant ideal...
Calendula Seeds - Orange Pacific Beauty (Organic)
60-90 Days to Maturity. Calendula officinalis. Organic Orange Pacific Beauty Calendula Flower Seeds. Non-GMO, heirloom, open-pollinated, organic flower seeds. Annual in zones 3, 4, 5, 6, 7, 8, 9, 10....
Onion Sets - Snowball White
100 Sets This is a pre-order item and is expected to ship in March to April for spring planting. Other seeds, supplies, or kits ordered with this product may ship...
Seed Potatoes - Purple Majesty (Organic)
This item is a pre-order item and is expected to ship in March for spring planting. Other seeds, supplies, or kits ordered with this product may ship separately. This product...
Ageratum Seeds - Dwarf Blue Mink
75-90 Days to maturity. Ageratum houstonianum ’Dwarf Blue Mink’. Dwarf Blue Mink Ageratum Seeds. Non-GMO, ornamental, annual, open-pollinated flower seeds. Dwarf Blue Mink flower seeds grow one of the season’s...
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