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]()
California Poppy Seeds - Formula Mix
50-60 Days to maturity. Eschscholzia californica. Formula Mix California Poppy Seeds. Non-GMO, annual. Formula Mix California poppies are a serious favorite of pollinators like honey bees. These easy-to-grow flowers are...
Carrot Seeds - Autumn King / Flakkee
The Autumn King/Flakkee carrot is a sweet breed that grows up to 2 ½" wide and 12" long with tops that can reach 16" tall. It is tolerant to the...
African Marigold Seeds - Hawaii
85-95 Days to maturity. Tagetes erecta. Hawaii African Marigold Seeds. Non-GMO, annual, open-pollinated. Hawaii African Marigolds offer extra long flower stalks with large, deep orange flowers. These easy-to-grow and low-maintenance...
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...
Pepper Seeds - Hot - Cascabella
75-85 Days to maturity (from transplant). Capsicum annuum. Cascabella Pepper Seeds. Non-GMO, annual, open-pollinated, heirloom, hot pepper with medium heat levels. 1,500 to 4,000 Scoville Heat Units. Suitable for growing...
Gourd Seeds - Crown of Thorns Shenot
110-125 days. Non-GMO. Heirloom. Shenot Crown of Thorns Gourd Seeds from True Leaf Market yield small decorative gourds featuring blunt, horn-like protrusions which make the gourd resemble a crown of...
Nasturtium - Whirlybird Mix - Microgreens Seeds
Whirlybird Mix Nasturtium microgreens seeds. Edible Flowers. Whirlybird microgreens have medium green leaves with some of the wavy edges rimmed with maroon. The pretty stems are a mix of green...
Carrot Seeds - Parisian - Organic
(55 days) A great little round carrot that is a nineteenth-century French heirloom. Organic Parisian is an early orange-red carrot that grows almost more like the shape of a large...
Verbena Flower Seeds - Tuscany Peach
8-10 inches high, spreads 16-20 inches. The replacement for Peaches and Cream boasts a naturally compact habit. Well branched and bush plants that fill in quickly. Same pale salmon-peach color...
Zinnia Seeds - California Giants - Organic
Organic California Giants Zinnia Seeds. 50 days to maturity. Can be grown in containers. Ornamental. Zinnia elegans. Heirloom, Non-GMO, Annual. Dating back to 1926, Zinnia California Giant is a mix...
Carrot Seeds - Shin Kuroda 5"
Non-GMO, heirloom Shin Kuroda 5" Carrot Seeds from True Leaf Market are a variant of the Chantenay-type Shin Kuroda carrot developed in Japan. The roots grow to about 5" long...
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,...
Nasturtium Seeds - Jewel Mix (Organic)
55-65 Days to Maturity. Tropaeolum majus. Organic Jewel Mix Nasturtium Flower Seeds. Non-GMO, organic, open-pollinated, heirloom flower. Annual in zones 2, 3, 4, 5, 6, 7, 8, 9, 10, 11....
Squash Seeds - Winter - Amish Pie
80-120 Days to maturity. Cucurbita maxima. Amish Pie Winter Squash Seeds. Non-GMO, annual, organic, open-pollinated heirloom. This is suitable for growing in fields, containers, garden plots, raised beds, and greenhouses....
Corn Seeds - Popcorn - Rainbow Jewel
120 Days to maturity. Zea mays ’Rainbow Jewel Popcorn’. Rainbow Jewel Popcorn Corn Seeds. Non-GMO, warm weather hybrid annual. Rainbow Jewel Corn is a hybrid cross between a white popcorn...
Zinnia Seeds - Magellan Series - Orange
55-60 Days to maturity. Zinnia elegans. Magellan Orange Zinnia Seeds. Non-GMO, organic, F1 hybrid, annual. Magellan Zinnia Orange seeds grow tough and resilient zinnias, best suited for gardens prone to...
Thunbergia Seeds - Alata Mix
56-63 days maturity. Thunbergia alata. Thunbergia Alata Mix Seeds. Non-GMO, Annual or Perennial. Ornamental. Thunbergia Alata Mix seeds are an essential plant for your garden, home, or patio for nearly...
Pepper Seeds - Hot - Cienfuegos Orange Hybrid
80-89 Days to maturity (from transplant). Capsicum chinense. Cienfuegos Orange Hybrid Pepper Seeds. Non-GMO, annual, F1 hybrid, deer resistant, hot pepper with extremely hot heat levels. 300,000 to 400,000 Scoville...
Pepper Seeds - Sweet - Cayenne Sweetness Hybrid
69-80 Days to maturity (from transplant). Capsicum annuum. Cayenne Sweetness Hybrid Pepper Seeds. Non-GMO, annual, F1 hybrid, sweet pepper with a mild heat level. 0 to 200 Scoville Heat Units....
Pepper Seeds - Hot - Mushroom Red
80-95 Days to maturity (from transplant). Capsicum chinense. Mushroom Red Pepper Seeds. Non-GMO, annual, open-pollinated, heirloom, deer resistant, hot pepper with hot heat levels. 25,000 to 35,000 Scoville Heat Units....
Gaillardia Seeds - Arizona Series
84-91 Days to maturity. Gaillardia aristata. Gaillardia Arizona Series Seeds. Non-GMO, Perennial. Arizona Series seeds promise exciting AAS award-winning sunburst gaillardias that are sure to invigorate any tired garden. Gaillardia...
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...
Eggplant Seeds - Turkish Orange (Organic)
70-90 Days to maturity. Solanum aethiopicum ’Turkish Orange’. Organic Turkish Orange Eggplant Seeds. Non-GMO, cool weather annual. Turkish Orange Eggplants are the next vegetable you need to try this season....
Pepper Seeds - Hot - NuMex Twilight
80-90 Days to maturity (from transplant). Capsicum annuum. Nu Mex Twilight Pepper Seeds. Non-GMO, annual, open-pollinated, heirloom, deer resistant, hot heat levels. 30,000 to 50,000 Scoville Heat Units. Suitable for...
Pepper Seeds - Hot - Habanero Orange (Organic)
100-109 Days to maturity (from transplant). Capsicum chinense. Habanero Orange Organic Pepper Seeds. Non-GMO, annual, organic, open-pollinated, heirloom, deer resistant, heat tolerant, drought tolerant, hot pepper with extra hot heat...
Hollyhock Seeds - Chaters Double Mixture
2nd-year maturity. Alcea rosea. Hollyhock Chater's Double Mixture Seeds. Non-GMO, Perennial/Biennial. Chater's Double Mixture hollyhock seeds promise to turn any stale bedding into a sensational and eye-catching garden this season....
Calendula Seeds - Fiesta Gitana
60-70 Days to maturity. Calendula officinalis ’Fiesta Gitana’. Fiesta Gitana Calendula Seeds. Non-GMO, open-pollinated, heirloom, annual, also known as pot marigold. This one-of-a-kind dwarf marigold, known as Fiesta Gitana, is...
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....
Sunflower Seeds - Midnight Rouge
55-65 Days to maturity. Helianthus annuus ’Midnight Rouge’. Midnight Rouge Sunflower Seeds. Non-GMO, annual, open pollinated, heirloom, ornamental. Midnight Rouge seeds produce some of the most deeply colored and stunning...
Pepper Seeds - Hot - Cayenne Orange
75 Days to maturity (from transplant). Capsicum annuum. Cayenne Orange Hot Pepper Seeds. Non-GMO, annual, open-pollinated, deer resistant, drought-tolerant, heat-tolerant, hot pepper with hot heat levels. 30,000 to 50,000 Scoville...
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