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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Chinese Broccoli Seeds - Ryokuho - Hybrid
45-50 Days to maturity. Brassica oleracea var. alboglabra 'Ryokuho'. Ryokuho Chinese Broccoli Hybrid Seeds. Annual Hybrid. Ryokuho is a cultivar of Chinese Broccoli desirable for its early maturity, vigorous growth,...
Turnip Seeds - Hidabeni
Turnip Seeds - Hidabeni. Heirloom, Non-GMO. Brassica rapa subsp. rapa. AKA kabu, kabura, manjing, mo ching, wu jing. 45-50 days. Cool season annual. Hidabeni turnip is a Japanese traditional vegetable,...
Gourd Seeds - Monster Mix F1
Monster Mix F1 Hybrid Gourd Seeds. Cucurbita pepo. F1 Hybrid. Non-GMO. Annual. 120 days to maturity. Bush plants produce all colors: orange yellow white and green gourds. ~ 850 Seeds...
Tomato Seeds - Slicing - Beefsteak White
85 Days to maturity (from transplant). Solanum lycoperscium. Beefsteak White Tomato Seeds. Non-GMO, annual, heirloom, open-pollinated, indeterminate, slicing tomato. Suitable for growing in garden plots, raised beds, and greenhouses. Also...
Chrysanthemum Greens Seeds - Garland Serrated Leaf
40-50 Days to maturity. Glebionis coronaria var. garland serrated leaf. Garland Serrated Leaf Chrysanthemum Greens Seeds. Cool-season annual heirloom. Non-GMO. Garland Serrated Leaf is a highly valued Japanese vegetable with...
Pepper Seeds - Hot - Cherry Mini Hot Hybrid
70 Days to maturity (from transplant). Capsicum annuum. Cherry Mini Hot Hybrid Pepper Seeds. Non-GMO, annual, F1 hybrid. A hot pepper with medium heat levels. 4000 to 6000 Scoville Heat...
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...
Pumpkin Seeds - Lumina (treated)
Non-GMO Lumina treated pumpkin seeds are ready in 90 days. This white pumpkins is medium-sized, and is about 10 to 15 pounds at full growth. Lumina pumpkies are white with...
Eggplant Seeds - Gretel Hybrid
50 days. AAS Winner for 2005. New miniature eggplants are white with violet/purple stripes. The fruit are non-bitter, with a tender skin and few seeds. The elongated, oval eggplants can...
Pak Choi Seeds - Chun Mei Hybrid
45-50 days to maturity.Brassica rapa var chinensis. Chun Mei Pak Hybrid Choi Chinese Cabbage Seeds. Non-GMO, late maturing cool-season annual, hybrid. Chun Mei hybrid is very slow bolting standard large...
Pumpkin Seeds - Jack Be Little - Organic
Organic Jack Be Little Pumpkin Seeds. 85 - 110 days to maturity. Cucurbita pepo. Heirloom, Non-GMO, Annual. Delightful miniature pumpkin with small vigorous vines. ~ 225 Seeds/ounce. Download Free Vegetable...
Pepper Seeds - Sweet - Cubanella Hybrid
68 Days to maturity (from transplant). Capsicum annuum. Cubanella Hybrid Pepper Seeds. Non-GMO, annual, F1 hybrid, sweet pepper with no heat. 0 Scoville Heat Units. Suitable for growing in garden...
Peppers From Hell Seed Starter 6-Pack
Are you ready to kick it up a notch?? The infamous ghost pepper is also known as Bhut Jolokia. This pepper is considered to be one of the hottest peppers...
Cucumber Seeds - Addis
55-65 Days to maturity. Cucumis sativus. Addis Cucumber Seeds. Non-GMO, annual, open-pollinated, heirloom, monoecious, pickling cucumber. Suitable for growing in fields, containers (with support), garden plots, raised beds, and greenhouses...
Watermelon Seeds - Icebox - Early Crimson Treat
70 Days to maturity. Citrullus lanatus. Early Crimson Treat Watermelon Seeds. Non-GMO, annual, open-pollinated, heirloom, heat tolerant, seeded, icebox watermelon. Early Crimson Treat Watermelon Seeds. Both light and dark green...
Tomato Seeds - Slicing - Gold Medal
90 Days to maturity (from transplant). Solanum lycopersicum. Gold Medal Tomato Seeds. Non-GMO, warm season annual, open-pollinated, heirloom, indeterminate, slicing tomato. Suitable for growing in garden plots, raised beds, and...
Squash Seeds - Winter - Sweet Keeper
110 Days to maturity. Cucurbita maxima. Sweet Keeper Winter Squash Seeds. Non-GMO, annual, open-pollinated, heirloom. Suitable for growing in fields, containers, garden plots, raised beds, and greenhouses. Resistant to common...
Chinese Cabbage Seeds - Osaka Shirona
40-60 Days to maturity. Brassica rapa var. Pekinensis 'Osaka Shirona'. Osaka Shirona Chinese Cabbage Seeds. Annual. The shirona Cabbage group may be a cross between Chinese cabbage and pak choi,...
Cucumber Seeds - Garden Sweet Burpless Hybrid (Organic)
55 Days to maturity. Cucumis sativus. Organic Garden Sweet Burpless Hybrid Cucumber Seeds. Non-GMO, annual, organic, F1 hybrid, monoecious, burpless, slicing cucumber. Suitable for growing in fields, containers (with support),...
Tomato Seeds - Slicing - Ace 55 VF (Organic)
85 Days to maturity (from transplant). Solanum lycoperscium. Organic Ace 55 VF Tomato Seeds. Non-GMO, annual, organic, open-pollinated, heirloom, determinate, slicing tomato. Suitable for growing in garden plots, raised beds,...
Bean Seeds - Bush - Tohya Soybean
85 Days to maturity. Glycine max. Tohya Edamame Soybean Bean Seeds. Non-GMO, annual, open-pollinated, heirloom, high-yielding, bush, shell, soybean, Asian bean. Suitable for growing in containers, garden plots, raised beds,...
Melon Seeds - Cantaloupe - Rocky Ford Green Flesh
89 Days to maturity. Cucumis melo. Rocky Ford Green Flesh Cantaloupe Melon Seeds. A non-GMO, annual, open-pollinated, heirloom, heat-tolerant Cantaloupe Melon. Suitable for growing in containers, garden plots, raised beds,...
Chinese Broccoli Seeds - Wan Shen
60-65 days to maturity.Brassica oleracea var alboglabra. Wan Shen Chinese Broccoli Seeds. Non-GMO, warm or cool-season annual, heirloom. Wan Shen is one of the most popular green vegetables in Chinese...
Gourd Seeds - Buab Khom - Hybrid
50-60 days to maturity. Luffa acutangula ’Buab Khom’. Buab Khom Gourd Seeds. Non-GMO, warm-season, annual, hybrid. Buab Khom is a hybrid ridge gourd that yields many high-quality fruits. The fruits...
Tomato Seeds - Slicing - Big Rainbow (Organic)
85-90 Days to maturity (from transplant). Solanum lycopersicum. Organic Big Rainbow Tomato Seeds. Non-GMO, annual, organic, open-pollinated, heirloom, indeterminate, slicing tomato. Suitable for growing in garden plots, raised beds, and...
Lettuce Seeds - Romaine - Parris White Cos
Parris White Cos Romaine Lettuce Seeds. 50 - 80 days to maturity. Lactuca sativa. Heirloom, Annual. Approximately 25,000 seeds/ounce. Lettuce Seeds - Romaine - Parris White Cos Large cylindrical upright...
Squash Seeds - Winter - Thelma Sanders
90 days to maturity. Cucurbita pepo. Thelma Sanders Acorn Winter Squash Seeds. Non-GMO, annual, heirloom, open-pollinated. Suitable for growing in fields, garden plots, and raised beds. Beloved Missouri heirloom acorn...
Tomato Seeds - Slicing - Giant Belgium Yellow
82-95 Days to maturity (from transplant). Solanum lycopersicum. Giant Belgium Yellow Tomato Seeds. Non-GMO, warm season annual, open-pollinated, heirloom, indeterminate, slicing tomato. Suitable for growing in garden plots, raised beds,...
Watermelon Seeds - Icebox - Triple Express Hybrid
Triple Express F1 Hybrid Watermelon Seeds. Citrullus lanatus. F1 Hybrid. Non-GMO. Annual. 80 days to maturity. Seedless. Triple Express F1 is an early Crimson Sweet triploid, with a firm flesh...
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