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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Lettuce Seeds, Romaine - Brune D'Hiver - Organic
Organic Brune D'Hiver Romaine Lettuce Seeds. 55 to 60 days to maturity. Lactuca sativa. Heirloom, Non-GMO, Annual. >Introduced in 1855, this French butterhead-type lettuce has crunchy green leaves with a...
Cucumber Seeds - Pick a Bushel F1 AAS
50 Days to maturity. Cucumis sativus. Pick A Bushel Hybrid AAS Cucumber Seeds. Non-GMO, annual, F1 hybrid, Regional 2014 AAS winning, monoecious, pickling cucumber. Suitable for growing in fields, containers,...
Eggplant Seeds - Shooting Stars
Shooting Stars Eggplant Seeds. Solanum melongena. 57 days to maturity. Heirloom, Annual. This elegant delicately striped vivid purple eggplant would make a magnificent pendant. Approximately 6,500 seeds/ounce Download Free Vegetable...
Tomato Seeds - Cherry - Green Grape
65-75 Days to maturity (from transplant). Solanum lycoperscium. Green Grape Tomato Seeds. Non-GMO, annual, open-pollinated, heirloom, determinate cherry tomato. Suitable for growing in garden plots, raised beds, and greenhouses. Developed...
Pak Choi Seeds - Da Hong Summer Hybrid
10-15 days microgreens; 20-30 days baby leaf; 45 days full maturity. Brassica rapa var chinensis. Da Hong Summer Hybrid Pak Choi Chinese Cabbage Seeds. Non-GMO, cool-season annual, hybrid. Da Hong...
Cucumber Seeds - Double Yield
Cucumis sativus (50 days) Double Yield cucumber was developed in 1924 by Joseph Harris & Company of Coldwater, NY. Very early. The fruit is perfectly symmetrical, very straight, blunt ends...
Tomato Seeds - Slicing - Fireworks
50-60 Days to maturity (from transplant). Solanum lycopersicum. Fireworks Tomato Seeds. Non-GMO, warm season annual, open-pollinated, heirloom, indeterminate, slicing tomato. Suitable for growing in garden plots, raised beds, greenhouses, and...
Tomato Seeds - Slicing - Floradel
85 Days to maturity (from transplant). Solanum lycopersicum. Floradel Tomato Seeds. Non-GMO, warm season annual, open-pollinated, heirloom, humidity tolerant, indeterminate, slicing tomato. Suitable for growing in garden plots, raised beds,...
Tomato Seeds - Cherry - Gum Drop Yellow Hybrid
75 Days to maturity (from transplant). Solanum lycoperscium. Gum Drop Yellow Tomato Seeds. Non-GMO, annual, F1 hybrid, indeterminate, cherry tomato. Suitable for growing in garden plots, raised beds, and greenhouses....
Tomato Seeds - Cherry - Honeybee Hybrid
60 Days to maturity (from transplant). Solanum lycoperscium. Honeybee Hybrid Tomato Seeds. Non-GMO, annual, F1 hybrid, semi-determinate cherry tomato. Suitable for growing in garden plots, raised beds, containers, and greenhouses....
Lettuce Seeds, Leaf - Green Salad Bowl - Organic
Organic Green Salad Bowl Leaf Lettuce Seeds. 50 days to maturity. Baby leaf maturity at 28 days. Lactuca sativa. Heirloom, Non-GMO, Annual. Approx. 25,000 Seeds per ounce. Download Free Vegetable...
Mustard Seeds - Chinese
60-65 days to maturity.Brassica juncea. Chinese Mustard Seeds. Non-GMO, cool-season, year-round annual, heirloom. This special selected Chinese mustard has a compact head with thick petioles and large wrapping leaves. Chinese...
Lettuce Seeds, Leaf - Prizehead - Organic
Organic Prizehead Leaf Lettuce Seeds. 45 - 55 days to maturity. Lactuca sativa. Heirloom, Non-GMO, Annual. Approx. 25,000 Seeds per ounce. Download Free Vegetable Growing Guide PDF Lettuce Seeds, Leaf...
Mustard Seeds - Red Komatsuna Hybrid
20-25 days for baby leaf, 40-50 days to maturity. Brassica rapa var. japonica. Red Mizuna Mustard Seeds. Non-GMO, cool-season, annual, hybrid. This small broad leaf mustard has a mild pungency...
Tomato Seeds - Cherry - Sugar Plum Hybrid
105 Days to maturity (from transplant). Solanum lycopersicum. Sugar Plum Hybrid Tomato Seeds. Non-GMO, warm season annual, F1 hybrid, indeterminate, cherry tomato. Suitable for growing in garden plots, raised beds,...
Pea Seeds - Snap - Sugar Sprint (Treated)
55-65 Days to maturity. Pisum sativum. Sugar Sprint Snap Pea Seeds (Treated). Non-GMO, annual, open-pollinated, heirloom, heat-tolerant snap pea. Suitable for growing in fields, containers, garden plots, raised beds, and...
Cucumber Seeds - Early Spring Burpless F1
58 Days to maturity. Cucumis sativus. Early Spring Burpless Hybrid Cucumber Seeds. Non-GMO, annual, F1 hybrid, monoecious, burpless, slicing cucumber. Suitable for growing in fields, containers (with support), garden plots,...
Tomato Seeds - Cherry - Cherry White
80 Days to maturity (from transplant). Solanum lycoperscium. Cherry White Tomato Seeds. Non-GMO, annual, open-pollinated, heirloom, indeterminate, cherry tomato. Suitable for growing in garden plots, raised beds, and greenhouses. Solanum...
Cucumber Seeds - Eversweet F1 (Organic)
55 Days to maturity. Cucumis sativus. Organic Eversweet Hybrid Cucumber Seeds. Non-GMO, annual, organic, F1 hybrid, monoecious, slicing cucumber. Suitable for growing in fields, containers (with support), garden plots, raised...
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....
Tomato Seeds - Cherry - Riesenstraube
75-85 Days to maturity (from transplant). Solanum lycopersicum. Riesenstraube Tomato Seeds. Non-GMO, annual, open-pollinated, heirloom, indeterminate cherry tomato. Suitable for growing in garden plots, raised beds, and greenhouses. German heirloom...
Pea Seeds - Blue Shelling (Organic)
Non-GMO, Organic, Open-pollinated, Heirloom Blue Shelling Seeds from True Leaf Market. This is a tall, attractive heirloom pea plant from the Netherlands that is centuries old with bluish to purple...
Pea Seeds, Afila 595
65 Days to maturity.Pisum Sativum. Afila 595 Pea Seeds. Annual, Non-GMO, Heirloom. Afila varieties of pea are cultivated for their delicious, gracefully attractive long tendrils. The tender pea shoot tips...
Chinese Cabbage Seeds - Matsushima No. 2
80 Days to maturity. Brassica rapa var. Pekinensis 'Matsushima No.2'. Matsushima No. 2 Chinese Cabbage Seeds. Annual Heirloom. The Matsushima No. 2 Chinese Cabbage is a unique Michihili-type compact heading...
Mustard Seeds - Japanese Giant Garnet
20-30 Days to Baby Leaf Maturity. Brassica juncea ’Japanese Giant Garnet’. Japanese Giant Garnet Mustard Seeds. Non-GMO, Open Pollinated, Annual. The solid, rounded leaves of this baby leaf variety are...
Onion Seeds - Long - Stuttgarter (Organic)
100 Days to maturity. Allium cepa. Organic Stuttgarter Onion Seeds. Non-GMO, annual, organic, open-pollinated, heirloom, bulbing, long-day onion. Suitable for growing in greenhouses, garden plots, and raised beds. AKA: Giant...
Mustard Seeds - Seaweed - Oka Hijiki
This seed is unavailable until 2027. Add your email to receive a notification when it is available again. Seaweed Mustard Seeds - Oka Hijiki. Non-GMO. Heirloom. Non-GMO. Salsola komarovi. 30-40...
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...
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