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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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....
Squash Seeds, Winter - Calabaza de Castilla
100 to 110 Days to full maturity. Cucurbita moschata Calabaza de Castilla Winter Squash Seeds. Annual, Non-GMO, Heirloom. This winter squash pumpkin variety has a rustic light brown color, with...
Snake Gourd
Lagenaria siceraria, not to be confused with Trichosanthes cucumerina. Both are called snake gourd. These gourds have a unique long shape. They grow 2-4" long and can be either straight...
Gourd Seeds - Apple Large
Apple Large (Lagenaria) gourds are a great decorative piece that can also be used for crafts. Gourds grow in an apple like shape that varies somewhat based on environment. They...
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...
Radish Seeds - Fire Candle
Fire Candle Radish Seeds. 30-40 Days to maturity. Annual, open-pollinated, and non-GMO seeds. Raphanus sativus. Looking more similar to a red carrot than spring radish, the Fire Radish candle is...
Squash Seeds - Winter - Hubbard Golden Delicious
Hubbard Golden Winter Squash Seeds. Annual. 100-120 Days to Harvest. Heirloom, Non-GMO, Open Pollinated. Cucurbita maxima. Other names: Red Hubbard, Golden Warted Hubbard. Developed by M. D. Ferry in 1898,...
Radish Seeds - Hailstone
In 25 days, growers should see 2-inch radishes develop a pure- white skin with firm flesh. Non-GMO and heirloom Hailstone Radish are reliable and quick-growing vegetables for new gardeners. 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...
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...
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,...
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,...
Amaranth (Organic) - Bulk Grains & Foods
Amaranth seeds (Amaranthus). 5-7 days to germinate. Amaranth, a pseudo-grain, was a staple food source for the Aztecs & Incas. Amaranth seeds are a great addition to emergency home food...
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....
Radish Seeds - Long Scarlet Cincinnati
Long Scarlet Cincinnati Radish Seeds. Heirloom, Non-GMO. Raphanus sativus. 30 days. Long tapered deep red roots, 6 x 3/4 in roots, crisp tender white flesh , medium tops, for bunching...
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...
Hot Radish Seeds - Karaine - Hybrid
70 days to maturity. Raphanus sativus. Karaine Hot Radish Seeds, Hybrid. Cool season annual, non-GMO. Hot radishes are a unique and flavorful variety of daikon that get their name from...
Gourd Seeds - Nam Tao Yao
65-70 days maturity after transplant. Lagenaria siceraria ’Nam Tao Yao’. Nam Tao Yao Gourd Seeds. Non-GMO, warm-season, annual, hybrid. This edible variety is vigorous, disease-tolerant, and high yielding. The fruit...
Squash Seeds - Summer - Summerpac F1
Summerpac F1 Hybrid Squash Seeds. Cucurbita pepo. F1 Hybrid. Non-GMO. Annual. 47 days to maturity. A Hybrid crookneck which is very smooth with no warts. Approximately 250 Seeds / Ounce....
Turnip Seeds - Tsugaru Scarlet - Hybrid
Turnip Seeds - Tsugaru Scarlet - Hybrid. Non-GMO. Brassica rapa subsp. rapa. 55 days to maturity. Cool season annual. These scarlet skinned, globe-shaped, hybrid Japanese turnips have pure white flesh...
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...
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...
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...
Asparagus Seeds - Sweet Purple
Asparagus Seeds - Sweet Purple Seeds per Package: 2 g - approximately 68 seeds 1 oz - approximately 950 seeds 4 oz - approximately 3,800 seeds 1 lb - approximately...
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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