May marks the shift into early summer conditions in the warm-winter zones, and gardens respond fast with rapid growth. Warm-season crops should be planted and growing strongly now, and succession sowing keeps harvests coming even as temperatures climb. Stay ahead of heat stress by mulching, watering consistently, and planting in the coolest part of the day — and in the hottest areas, begin planning for shade cloth and other summer protection.
Indoors (fresh harvests):
-
Microgreens: peas, broccoli, sunflowers, arugula
-
Sprouts: alfalfa, broccoli, radish, mung
-
Herbs & greens under lights: chives, parsley, mint
Transplants to move outdoors: Most warm-season crops should already be in the ground. If you have heat-tolerant starts on hand, get them out early in the month before conditions get too stressful.
Crops that can be directly sown outdoors in May: okra, sweet potato slips, cowpeas, yard-long beans, Malabar spinach, Armenian cucumber, and other heat-tolerant varieties. Standard cucumbers, squash, and beans can still go in early May in many areas.
Cover crops: cowpeas, sunn hemp, buckwheat, sorghum-sudangrass
Note: Cool-season crops are wrapping up. The focus shifts to heat-tolerant varieties and keeping the soil covered.
Tip: A Southern California zone 10 can be very different from a Florida zone 10. 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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Thyme Seeds - Winter
95 Days to maturity. Thymus vulgaris. Winter Thyme Seeds. Non-GMO, perennial, open-pollinated, heirloom. Suitable for growing in fields, containers, garden plots, raised beds, and greenhouses. Common Thyme, German Thyme, English...
Rutabaga Seeds - Laurentian
90-95 days. Non-GMO. Heirloom. Laurentian Rutabaga Seeds from True Leaf Market produce deep purple and creamy yellow rutabagas weighing up to 1 lb. The smooth, uniform roots are typically between...
Sunflower Seeds - Chocolate Cherry
85-95 Days to maturity. Helianthus annuus. Non-GMO. Open Pollinated. Annual. Heirloom. Heirloom Chocolate Cherry sunflower seeds mature to be 6 to 7 feet tall ornamentals with deep burgundy petals and...
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...
Tomatillo Seeds - Cape Gooseberry Large Fruit
90-120 days. Physalis peruviana. Cape Gooseberry Large Fruit Tomatillo Seeds. Non-GMO, warm-season annual, heirloom, open-pollinated. This crop is suitable for garden plots, raised beds, and larger containers. This strain will...
Lupine Seeds - Sweet Lupine - Moonshine
10-14 Days to Harvest. Lupine luteus. Moonshine Sweet Lupine Microgreens Seeds. Non-GMO, flower microgreens, high germination, unique appearance. Lupine microgreens can easily grow indoors, requiring minimal space and time. With...
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...
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...
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...
Parsley Seeds - Hamburg Rooted
Non-GMO, Heirloom Hamburg Rooted Parsley Herb Garden Seed from True Leaf Market. Petroselinum crispum. This parsley is harvested for its root as a culinary herb. Cool perennial Parsley such as...
Gourd Seeds - Martinhouse Bottle
Martinhouse Bottle Gourd Seeds. 90 - 110 days to maturity. Lagenaria siceraria. Heirloom, Annual. ~ 185 seeds/ounce Download Free Vegetable Growing Guide PDF Gourd Seeds - Martinhouse Bottle Download Free...
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....
Corn Seeds - Flour - Montana Morado Maize
90-110 Days to maturity. Zea mays. Montana Morado Maize Corn Seeds. Non-GMO, warm-weather annual, open-pollinated, certified organic flour corn. Suitable for growing in garden plots or raised beds. Montana Morado...
Bean Seeds - Pole - Great Northern Cannellini (Organic)
85-90 Days to maturity. Phaseolus vulgaris. Organic Great Northern Cannellini Bean Seeds. Non-GMO, annual, open-pollinated, heirloom, high yielding, heat tolerant, shelling, semi-vining dry pole bean. Suitable for growing in containers,...
Cauliflower Seeds - Purple of Sicily
70-90 Days to maturity. Brassica oleracea. Purple of Sicily Cauliflower Vegetable Seeds. Non-GMO, annual, open-pollinated, heirloom cauliflower. Purple of Sicily is a standout heirloom cauliflower variety that traces its origins...
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...
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...
Rapeseed - Canola
74-140 Days to maturity. Brassica napus. Spring Rapeseed Canola Seeds. Non-GMO, open-pollinated biennial. Spring Rapeseed Canola can be grown as sprouts, microgreens, roots, leafy greens, vegetable oil, biofuel, forage, or...
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...
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....
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...
Amaranthus Seeds - Love Lies Bleeding
90-100 Days to maturity. Amaranthus caudatus. Love Lies Bleeding Amaranthus Seeds. Non-GMO, heirloom, annual. Love Lies Bleeding amaranthus is one of the most exotic and ornamental plants available to the...
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...
Seed Potatoes - French Fingerling (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...
Zinnia Seeds - Cactus Flowered Mix
75-90 Days to Maturity. Zinnia elegans. Zinnia Cactus Flowered Mix Flower Seeds. Non-GMO, open-pollinated, annual, edible, deer-resistant, and attracts pollinators. Displays pink, purple, red, orange, white, and yellow colored blooms...
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...
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