May is prime warm-season planting time in mild-winter zones, with soil temperatures rising and growth accelerating. This is the month to get main-season crops established outdoors, keep up with succession sowing, and set up supports before vines and tall plants take off. Watch moisture as days warm, mulch to hold soil moisture, and keep an eye out for the first big flush of pests as the garden hits its stride.
Indoors (fresh harvests):
-
Microgreens: peas, broccoli, sunflowers, arugula
-
Sprouts: alfalfa, broccoli, radish, mung
-
Herbs & greens under lights: chives, parsley, mint
Transplants to move outdoors (harden first): pepper, tomato, eggplant, melons, basil, okra — these should go out early May if not already in the ground
Crops that can be directly sown outdoors in May: beans, corn, cucumber, squash, melons, okra, sunflower, basil, dill, sweet potato slips. Succession sow beets, carrots, and radishes early in the month before heat sets in.
Cover crops: buckwheat, cowpeas, sorghum-sudangrass
Note: Warm-season crops should be going directly outdoors now, not starting under lights.
Tip: An Olympia, WA zone 8 is very different from a Jackson, MS zone 8. Consider checking with your state Extension Service office for more specific recommendations and guidelines.
Use your USDA zone as a guide. Microclimates matter — coastal/urban spots run warmer; high elevation runs colder.
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Tobacco Seeds - Comstock
~45–50 Days from transplant to maturity. Nicotiana tabacum. Comstock Tobacco Seeds. Non-GMO, annual, open-pollinated, heirloom. Suitable for growing in fields, containers, garden plots, raised beds, and greenhouses. Resistant to deer....
Wine Cap Mushroom Sawdust Spawn (Organic)
Fulfilled by our friends at North Spore Also known as the "Garden Giant," Wine Cap (Stropharia rugoso-annulata) is a delicious mushroom with a mild, earthy flavor reminiscent of artichokes and...
Swiss Chard Seeds - Flamingo
Flamingo Swiss Chard Seeds. 60 days to full maturity. 30 days to maturity for baby leaves. Can be grown in containers. Can be grown as micro greens. Beta vulgaris. Open...
Rapeseed - Canola (Organic)
74-140 Days to maturity. Brassica napus. Organic Spring Rapeseed Canola Seeds. Non-GMO, organic, open-pollinated biennial. This Organic Spring Rapeseed Canola can be grown as sprouts, microgreens, roots, leafy greens, vegetable...
Echinacea Seeds - Purpurea (Organic)
455 Days to maturity (2nd year). Echinacea purpurea. Purple Coneflower Flower Seeds. Non-GMO, heirloom, open-pollinated, organic, perennial flower in zones 3, 4, 5, 6, 7, 8, and 9. Deer resistant...
Ecotone - Hydroponic Grow Mats
Ecotone Hydroponic Grow Mats from Sustainable Seed Company. Microgreens. Wheatgrass. Seed sprouting. Ecotone Hydroponic Grow Mats are made from 100% post-consumer plastic bottles and can be recycled again after harvest....
Organic Self-Watering Cat Grass Kit
We designed our Self Watering Cat Grass kit for our own cats, with their health and happiness in mind. Hands down, this is our easiest-to-use cat grass system for a...
Eggplant Seeds - Morden Midget (organic)
65 Days to maturity. Solanum melongena. Organic Morden Midget Eggplant Vegetable Seeds. Non-GMO, annual, organic, open-pollinated, heirloom, italian eggplant. Suitable for growing in greenhouses, garden plots, raised beds, or containers....
Salad Burnet Herb Seeds - Microgreens
Salad Burnet Herb Garden Seeds. 70 to 100 Days. Sanguisorba minor. Non-GMO, Heirloom, Open Pollinated. Perennial in USDA zones 4 to 8, but can be grown as an annual. Makes...
Gourd Seeds - Caveman's Club
Cavemans Club Gourd Seeds. AKA: Maranka Gourds. 120 days. Annual. Heirloom. Non GMO. are dark green and have a rounded base with a long curved neck that gets thin halfway...
Bean Seeds - Bush - Jackson Wonder Lima
65-85 Days to maturity. Phaseolus lunatus. Jackson Wonder Lima Bean Seeds. Non-GMO, annual, open-pollinated, heirloom, high-yielding, drought-tolerant lima bean. Suitable for growing in containers, garden plots, raised beds, and greenhouses....
Basil Seeds - Cinnamon (Organic)
60-90 Days to maturity. Ocimum basilicum. Organic Cinnamon Basil Seeds. Non-GMO, annual, organic, open-pollinated, heirloom. Suitable for growing in fields, containers, garden plots, raised beds, and greenhouses. As an heirloom...
Radish Seeds - Pink Summercicle
32-40 Days to maturity. Raphanus sativus. Pink Summercicle Radish Seeds. Non-GMO, annual, open-pollinated, heirloom, slow bolting, spring radish. Pink Summercicle (Shunkyo Semi-Long) is known for its delightful spicy flavor paired...
Cotton Seeds - Sea Island Brown
135 Days to maturity. Gossypium barbadense. Sea Island Brown Cotton Seeds. Non-GMO, open-pollinated, heirloom cotton seeds. Annual in zones 8-11. It may be grown in zones 6-7 if started indoors...
Gourd Seeds - Bottle
100-120 Days to maturity. Lagenaria siceraria. Bottle Gourd Vegetable Seeds. Non-GMO, annual, open-pollinated, heirloom, bottle gourd. Bottle Gourd is valued for its versatility in cooking, with both the young fruit...
Amaranth Seeds - All Red Leaf - Microgreens Seeds
10 Days to Harvest. Amaranthus cruentus. All Red Leaf Amaranth Microgreens Seeds. Organic. Non-GMO. Microgreens. High Germination. Amaranth is a pseudo-grain that can be grown as sprouts or microgreens, ground...
Pepper Seeds - Hot - Tepin
100 Days to maturity (from transplant). Capsicum annuum var. glabriusculum. Tepin Hot Pepper Seeds. Non-GMO, annual, open-pollinated, deer resistant, heat tolerant, drought tolerant, hot pepper with hot heat levels. 50,000-100,000...
Celery Seeds - Golden Boy
Golden Boy Celery Seeds. Heirloom, Annual. Apium gravolens. 85 days to maturity. Golden Boy grows 18 to 20 inches tall. Approximately 70,000 seeds/ounce Download Free Vegetable Growing Guide PDF Celery...
Borage Seeds (Organic) - Microgreens Seeds
10-20 Days to maturity. Borago officinalis. Organic Borage Microgreen Seeds. Non-GMO, organic, open-pollinated, heirloom, annual herb and microgreens seeds. These underutilized microgreens are striking with their vibrant green leaves and...
Cardoon Seeds - Ivory White
Non-GMO, heirloom Ivory White Cardoon seeds from True Leaf Market let you grow the untamed predecessor of the domesticated artichoke, either for its ornamental value or for the delicious mild...
Gourd Seeds - Dipper - Extra Long Handle
Dipper - Extra Long Handle Gourd Seeds. 120 days to maturity. Heirloom, Annual. Lagenaria siceraria. Dipper Extra Long Handle is a unique variety! Approximately 840 seeds/ounce Download Free Vegetable Growing...
China Aster Seeds - Single Rainbow Mix
90-120 Days to maturity. Callistephus chinensis. Single Rainbow Mix China Aster Seeds. Non-GMO,ornamental, annual, heirloom, cut flower. Single Rainbow Mix China Aster flower garden seeds grow cut-flower-worthy, spring, summer, and...
Bean Seeds - Bush - French Garden
50-60 Days to maturity. Phaseolus vulgaris. French Garden Bush Bean Seeds. Non-GMO, annual, open-pollinated, heirloom, high-yielding, bush, snap green bean. Suitable for growing in containers, garden plots, raised beds, and...
Corn Seeds - Popcorn - Miniature Blue
100-110 Days to maturity. Zea mays ’Miniature Blue’. Miniature Blue Corn Seeds. Non-GMO, heirloom, open-pollinated, annual, Pop Corn. Suitable for growing in garden plots or raised beds. Corn tolerates heat...
Dianthus Seeds - Cottage Pinks
60-90 days to maturity. Dianthus plumarius ’Cottage Pinks’. Dianthus Cottage Pinks Flower Seeds. Non-GMO, open-pollinated, perennial flower. This late spring to mid-summer bloomer has a delightful clove scent when in...
Seed Assortment - Zone 9 Garden
12 Variety Zone 9 Garden Seed Collection. This assortment of summer vegetables is a perfect selection for gardeners in both Zones 9a and 9b. Each variety grows well in the...
Amaranth Seeds - Red Army
Red Army Amaranth Seeds. Non-GMO. Heirloom. Microgreen and Garden Seeds. Amaranthus cruentus. AKA: Blood Amaranth, Princes Feather, or Mexican Grain Amaranth. 100-130 days. Red Army amaranth is a darker and...
Asparagus Crowns - Jersey Knight Hybrid
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...
Horseradish Root
2 Roots This is a pre-order item and is expected to ship from March to April. Other seeds, supplies, or kits ordered with this product will ship separately. This product...
Squash Seeds - Summer - Black Zucchini (Organic)
44-62 Days to maturity. Cucurbita pepo. Organic Black Zucchini Summer Squash Seeds. Non-GMO, warm weather annual, open-pollinated, summer squash. While this variety is named ‘black’, this zucchini actually has a...
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