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 - Slicing - Old German
75 Days to maturity (from transplant). Solanum lycopersicum. Old German Tomato Seeds. Non-GMO, warm season annual, open-pollinated, heirloom, indeterminate, slicing tomato. Suitable for growing in garden plots, raised beds, and...
Squash Seeds - Vermicelli F1
cucurbita pepo (90 days) Despite it's resemblance to the Italian pasta, Spaghetti squash originally originated in Japan. This squash gets its name from the pasta-like strands that come out of...
Celery Seeds - Red Stalk (Organic)
Apium graveolens Approximately 1,000 Organic celery seeds per 500 mg packet. Red Stalk celery has been grown since the 1700s. Celery Seeds - Red Stalk - Organic This celery has...
Corn Seeds - Dent - Boone County White
110-120 Days to maturity. Zea mays. Boone County White Corn Seeds. Non-GMO, annual, open-pollinated, heirloom, Dent Corn. Suitable for growing in garden plots or raised beds. Corn tolerates heat and...
Corn Seeds - Popcorn - Rainbow Jewel
120 Days to maturity. Zea mays ’Rainbow Jewel Popcorn’. Rainbow Jewel Popcorn Corn Seeds. Non-GMO, warm weather hybrid annual. Rainbow Jewel Corn is a hybrid cross between a white popcorn...
Pak Choi Seeds - Taisai
50 Days to maturity. Brassica rapa Chinensis group. Taisai Pak Choi (Bok Choy) Seeds. Cool-Warm Season Annual Heirloom. The leaves of this popular and vigorous pak choi or choy sum...
Mustard Seeds - Mizuna - Lime Streaks
45 Days. Brassica rapa var. japonica. Non-GMO. Annual. Heirloom. Wonderfully serrated and ornamental heirloom baby-leaf mustard greens, Lime Streaks mizuna garden seeds grow a tangy and popular green for many...
Bean Seeds - Bush - Kentucky Wonder
50-65 Days to maturity. Phaseolus vulgaris. Kentucky Wonder Bush Bean Seeds. Non-GMO, annual, open-pollinated, heirloom, heat-tolerant, high-yielding, bush, snap green bean. Suitable for growing in containers, garden plots, raised beds,...
Cucumber Seeds - Pioneer Hybrid
50 Days to maturity. Cucumis sativus. Pioneer Hybrid Cucumber Seeds. Non-GMO, annual, F1 hybrid, gynoecious, pickling cucumber. Suitable for growing in fields, containers (with support), garden plots, raised beds, and...
Lettuce Seeds - Butterhead - Carmona Red
Carmona Red Butterhead Lettuce Seeds. 50 days to maturity. Lactuca sativa. Heirloom. Annual. A favorite of market growers Carmona produces large bright red heads with lime green hearts. Silky texture...
Bean Seeds - Pole - Dark Green Yard Long
70 Days to maturity. Vigna unguiculata subsp. sesquipedalis. Dark Green Yard Long Bean Seeds. Non-GMO, annual, heat-tolerant, open-pollinated, heirloom, pole, snap, Asian, specialty bean. Suitable for growing in containers, garden...
Bean Seeds - Bush - Provider (Treated)
50-65 Days to maturity. Phaseolus vulgaris. Provider Bush Bean Treated Seeds. Non-GMO, annual, hybrid, open-pollinated, heirloom, high-yielding, heat-tolerant, bush, snap, green bean. Suitable for growing in containers, garden plots, raised...
Swiss Chard Seeds - Barese Dark Green Smooth Leaf
Barese Dark Green Smooth Leaf Swiss Chard Seeds. 28 Days to harvest. Non-GMO, heirloom, open pollinated seeds. Beta vulgaris ssp. cicla. AKA: Barese Swiss Chard. Italian variety. Barese Swiss Chard...
Onion Seeds - Bunching - Heshiko (Treated)
60-80 Days to maturity. Allium fistulosum. Heshiko Treated Onion Seeds (Thiram fungicide). Non-GMO, perennial, open-pollinated, heirloom, cold tolerant, drought tolerant, bunching onion. Suitable for growing in greenhouses, garden plots, raised...
Tomato Seeds - Salad - Sub Arctic Plenty
50-60 Days to maturity (from transplant). Solanum lycopersicum. Sub Arctic Plenty Tomato Seeds. Non-GMO, warm season annual, open-pollinated, heirloom, determinate, salad tomato. Suitable for growing in garden plots, raised beds,...
Bean Seeds - Bush - Black Valentine
50-65 Days to maturity. Phaseolus vulgaris. Black Valentine Bush Bean Seeds. Non-GMO, annual, open-pollinated, heirloom snap or shell bush bean. Suitable for growing in containers, garden plots, raised beds, and...
Tomato Seeds - Salad - Czech Bush
70 Days to maturity (from transplant). Solanum lycoperscium. Czech Bush Tomato Seeds. Non-GMO, annual, hybrid, determinate, salad tomato. Suitable for growing in garden plots, raised beds, greenhouses, and containers. Stakeless,...
Onion Seeds - Bunching - Heshiko
60-80 Days to maturity. Allium fistulosum. Heshiko Onion Seeds. Non-GMO, perennial, open-pollinated, heirloom, cold tolerant, drought tolerant, bunching onion. Suitable for growing in greenhouses, garden plots, raised beds, and containers....
Lettuce Seeds - Rouge d Hiver - Organic
Lactuca sativa. 28 days for baby leaf, 60 days full grown. Before grocery stores standardized lettuce into pale green sameness, gardeners in 19th century France were growing Rouge d'Hiver Lettuce,...
Lettuce Seeds - Batavian - Nevada
Nevada Batavian Lettuce Seeds. 48 days to maturity. Lactuca sativa. Open Pollinated. Annual. A Summer Crisp-type lettuce. Nevada's hardy green leaves are crisp with a smooth, fresh taste. ~ 25,000...
Tomato Seeds - Slicing - Bush Champion II Hybrid
70 Days to maturity (from transplant). Solanum lycoperscium. Bush Champion II Hybrid Tomato Seeds. Non-GMO, annual, F1 hybrid, determinate, slicing tomato. Suitable for growing in garden plots, raised beds, greenhouses,...
Pea Seeds - Snap - Purple Magnolia
60-70 Days to maturity. Pisum sativum. Purple Magnolia Snap Pea Seeds. Non-GMO, cool-season annual, hybrid snap peas. Suitable for growing in containers, garden plots, raised beds, and greenhouses. The Purple...
Okra Seeds - Blondy
50 days. Blondy Okra Seeds - Non-GMO, Abelmoschus esculentus. Blondy is an AAS winning dwarf Okra great for short seasons. Named after its plentiful creamy light green spineless pods, this...
Melon Seeds - Cantaloupe - Golden Delicious
75 Days to maturity. Cucumis melo var. cantalupensis.. Golden Delicious Cantaloupe Melon Seeds. A non-GMO, annual, heirloom, open-pollinated, heat-tolerant Cantaloupe Melon. Suitable for growing in garden plots, raised beds, and...
Endive Seeds - Gourmet Mix
Gourmet Mix endive and chicory is a great addition to a home garden to get a wide variety of textures and flavors in one go. Sow seeds directly outside in...
Gourd Seeds - Nam Tao Klom - Hybrid
60-65 Days to Maturity (after transplanting). Lagenaria siceraria ’Nam Tao Klom’. Nam Tao Klom Improved Gourd Seeds. Non-GMO, warm-season, perennial, F1 hybrid. This vigorous climbing hybrid produces round-shaped fruit with...
Squash Seeds - Table King Bush Acorn (Organic)
80 days to maturity. Cucurbita pepo. Organic Table King Bush Acorn Winter Squash Seeds. Non-GMO, annual, heirloom, open-pollinated, AAS winner 1974. Suitable for growing in fields, garden plots, raised beds,...
Watermelon Seeds - Icebox - Bush Jubilee
90 Days to maturity. Citrullus lanatus. Bush Jubilee Watermelon Seeds. Non-GMO, annual, open-pollinated, heirloom, heat tolerant, seeded, Icebox watermelon. Vines spread 3-5 ft. Produces watermelons that are about 10-13 lbs....
Corn Seeds - Popcorn - Neon Pink
85-105 Days to maturity. Zea mays. Neon Pink Corn Seeds. Non-GMO, annual, open-pollinated, heirloom, Pop Corn. Suitable for growing in garden plots or raised beds. Corn tolerates heat and drought-prone...
Pepper Seeds - Hot - Cayenne Orange
75 Days to maturity (from transplant). Capsicum annuum. Cayenne Orange Hot Pepper Seeds. Non-GMO, annual, open-pollinated, deer resistant, drought-tolerant, heat-tolerant, hot pepper with hot heat levels. 30,000 to 50,000 Scoville...
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