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.

50 100 true //store.trueleafmarket.com/cdn/shop/t/54/assets/review-fallback.json?v=33078429469613971781712858278
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2352 Items
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Chinese Broccoli Seeds - Ryokuho - Hybridmid size pouch type seed packaging for - Chinese Broccoli Ryokuho Hybrid
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Chinese Broccoli Seeds - Ryokuho - Hybrid
Starting at $3.99
Turnip Seeds - Hidabenimid size pouch type seed packaging for - Turnip Hidabeni
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Gourd Seeds - Monster Mix F1mid size pouch type seed packaging for - Gourd Monster Mix F1
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Tomato Seeds - Slicing - Beefsteak Whitemid size pouch type seed packaging for - Tomato Slicing Beefsteak White
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Chrysanthemum Greens Seeds - Garland Serrated Leafmid size pouch type seed packaging for - Chrysanthemum Greens Garland Serrated Leaf
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Pepper Seeds - Hot - Cherry Mini Hot Hybridmid size pouch type seed packaging for - Pepper Hot Cherry Mini Hot Hybrid
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Celery Seeds - Golden Boysmall size packet type seed packaging for - Celery Golden Boy
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Starting at $3.39
Pumpkin Seeds - Lumina (treated)Pumpkin Seeds - Lumina (treated)
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Starting at $51.52
Eggplant Seeds - Gretel Hybridmid size pouch type seed packaging for - Eggplant Gretel Hybrid
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Starting at $4.49
Squash Seeds - Summer - Bennings Green Tint Scallop (Organic)small size packet type seed packaging for - Squash Summer Bennings Green Tint Scallop Organic
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Organic
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Pak Choi Seeds - Chun Mei Hybridmid size pouch type seed packaging for - Pak Choi Chun Mei Hybrid
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Pumpkin Seeds - Jack Be Little - Organicsmall size packet type seed packaging for - Pumpkin Jack Be Little Organic
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Heirloom
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Pumpkin Seeds - Jack Be Little - Organic
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Pepper Seeds - Sweet - Cubanella Hybridmid size pouch type seed packaging for - Pepper Sweet Cubanella Hybrid
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Peppers from Hell Seed StarterPeppers From Hell Seed Starter 6-Pack
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Peppers From Hell Seed Starter 6-Pack
$5.60
Cucumber Seeds - Addissmall size packet type seed packaging for - Cucumber Addis
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Cucumber Seeds - Addis
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Radish Seeds - Minowase Summer Cross #3 - Hybridmid size pouch type seed packaging for - Radish Minowase Summer Cross #3 Hybrid
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Radish Seeds - Minowase Summer Cross #3 - Hybrid
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Watermelon Seeds - Icebox - Early Crimson Treatsmall size packet type seed packaging for - Watermelon Icebox Early Crimson Treat
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Tomato Seeds - Slicing - Gold Medalmid size pouch type seed packaging for - Tomato Slicing Gold Medal
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Squash Seeds - Winter - Sweet Keepersmall size packet type seed packaging for - Squash Winter Sweet Keeper
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Starting at $3.39
Chinese Cabbage Seeds - Osaka Shironamid size pouch type seed packaging for - Chinese Cabbage Osaka Shirona
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Cucumber Seeds - Garden Sweet Burpless Hybrid (Organic)small size packet type seed packaging for - Cucumber Garden Sweet Burpless Hybrid Organic
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Organic
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Starting at $5.19
Tomato Seeds - Slicing - Ace 55 VF (Organic)mid size pouch type seed packaging for - Tomato Slicing Yellow Perfection Organic
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Starting at $3.59
Bean Seeds - Bush - Tohya Soybeanmid size pouch type seed packaging for - Bean Bush Tohya Soybean
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Bean Seeds - Bush - Tohya Soybean
Starting at $3.99
Melon Seeds - Cantaloupe - Rocky Ford Green Fleshmid size pouch type seed packaging for - Melon Cantaloupe Rocky Ford Green Flesh
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Melon Seeds - Cantaloupe - Rocky Ford Green Flesh
Starting at $2.99
Chinese Broccoli Seeds - Wan Shenmid size pouch type seed packaging for - Chinese Broccoli Wan Shen
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Gourd Seeds - Buab Khom - Hybridmid size pouch type seed packaging for - Gourd Buab Khom Hybrid
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Tomato Seeds - Slicing - Big Rainbow (Organic)mid size pouch type seed packaging for - Tomato Slicing Big Rainbow Organic
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Lettuce Seeds - Romaine - Parris White Cossmall size packet type seed packaging for - Lettuce Romaine Parris White Cos
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Squash Seeds - Winter - Thelma Sanderssmall size packet type seed packaging for - Squash Winter Thelma Sanders
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Tomato Seeds - Slicing - Giant Belgium Yellow
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Watermelon Seeds - Icebox - Triple Express Hybrid
Starting at $8.49
Cauliflower Seeds - Veronica Romanesco Hybrid - Clearance Seeds
Starting at $4.20
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