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
Legend: H for Heirloom, O for Organic, A for AAS Winner, F for staff favorites
671 Items
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Pak Choi Seeds - Canton WhitePak Choi Seeds - Canton White
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Bean Seeds - Bush - Wase Adzukimid size pouch type seed packaging for - Bean Bush Wase Adzuki
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Pea Seeds - Field - MaplePea Seeds - Field - Maple
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Mustard Seeds - Kekkyu Takanamid size pouch type seed packaging for - Mustard Kekkyu Takana
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Pak Choi Seeds - Red Kingdom - Hybridmid size pouch type seed packaging for - Pak Choi Red Kingdom Hybrid
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Bean Seeds - Bush - Mappe Green Mungmid size pouch type seed packaging for - Bean Bush Mappe Green Mung
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Gourd Seeds - Calabashsmall size packet type seed packaging for - Gourd Calabash
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Fennel - Sweet - Microgreens SeedsFennel - Sweet - Microgreens Seeds
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Chinese Cabbage Seeds - RCC9 Red - Hybridmid size pouch type seed packaging for - Chinese Cabbage RCC9 Red Hybrid
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Basil Seeds - Persian AASBasil Seeds - Persian AAS
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Eggplant Seeds - Talong Purple No.1mid size pouch type seed packaging for - Eggplant Talong Purple No1
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Squash Seeds - Japanese, Winter - Kogikumid size pouch type seed packaging for - Squash Japanese Winter Kogiku
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Radish Seeds - Chinese - Shunkyomid size pouch type seed packaging for - Radish Chinese Shunkyo
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Mustard Seeds - Early Mibunamid size pouch type seed packaging for - Mustard Early Mibuna
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Radish Seeds - Korean - Big Time Hybrid (Treated)mid size pouch type seed packaging for - Radish Korean Big Time Hybrid Treated
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Gourd Seeds - Haa Sing - Hybridmid size pouch type seed packaging for - Gourd Haa Sing Hybrid
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Water Pepper Herb SeedsWater Pepper Herb Seeds
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Bean Seeds - Bush - Shinonome Soybeanmid size pouch type seed packaging for - Bean Bush Shinonome Soybean
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Radish Seeds - Chinese - Mantanghong Improved - Hybridmid size pouch type seed packaging for - Radish Chinese Mantanghong Improved Hybrid
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Onion - Bunching - Evergreen (Organic) - Microgreens SeedsOnion - Bunching - Evergreen (Organic) - Microgreens Seeds
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Chef's Specialty Seed Assortment - Korean Cuisine GardenChef's Specialty Seed Assortment - Korean Cuisine Garden
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$25.90
Hot Radish Seeds - Aka (Red) Karaine - Hybridmid size pouch type seed packaging for - Hot Radish Aka Red Karaine Hybrid
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Starting at $3.99
Turnip Seeds - Nameniasmall size packet type seed packaging for - Turnip Namenia
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Mustard Seeds - Tendergreen - Organicsmall size packet type seed packaging for - Mustard Tendergreen Organic
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Pak Choi Seeds - Nabai Spring - Hybridmid size pouch type seed packaging for - Pak Choi Nabai Spring Hybrid
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Mustard Seeds - Gai Choimid size pouch type seed packaging for - Mustard Gai Choi
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Chinese Cabbage Seeds - RCC3 Red - Hybridmid size pouch type seed packaging for - Chinese Cabbage RCC3 Red Hybrid
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Mustard Seeds - Serifon (Suehlihung)Mustard Seeds - Serifon (Suehlihung)
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Tobacco Seeds - Sherazismall size packet type seed packaging for - Tobacco Sherazi
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Pak Choi Seeds - Da Hong Winter Hybridmid size pouch type seed packaging for - Pak Choi Da Hong Winter Hybrid
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Shiso Seeds - Bicolor (Organic)
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Melon Seeds - Japanese - New Melon
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