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
2352 Items
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Tomato Seeds - Paste - Principe Borghesesmall size packet type seed packaging for - Tomato Paste Principe Borghese
-0
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Tomato Seeds - Paste - Principe Borghese
Starting at $2.99
Radish Seeds - White Beautysmall size packet type seed packaging for - Radish White Beauty
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Radish Seeds - White Beauty
Starting at $2.99
Pea Seeds, Afila 595Pea Seeds, Afila 595
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Pea Seeds, Afila 595
Starting at $3.99
Gourd Seeds - Caveman's Clubsmall size packet type seed packaging for - Gourd Cavemans Club
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Heirloom
Gourd Seeds - Caveman's Club
Starting at $3.29
Bean Seeds - Bush - Jackson Wonder Limamid size pouch type seed packaging for - Zinnia Magellan Series Orange
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Heirloom
Bean Seeds - Bush - Jackson Wonder Lima
Starting at $4.33
Chinese Cabbage Seeds - Matsushima No. 2mid size pouch type seed packaging for - Chinese Cabbage Matsushima No 2
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Chinese Cabbage Seeds - Matsushima No. 2
Starting at $3.99
Mustard Seeds - Japanese Giant Garnet
-50%
Mustard Seeds - Japanese Giant Garnet
Starting at $1.99
Radish Seeds - Crayon Colors Mixmid size pouch type seed packaging for - Radish Crayon Colors Mix
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Radish Seeds - Crayon Colors Mix
Starting at $2.99
Pepper Seeds - Hot - NuMex Joe E Parkersmall size packet type seed packaging for - Pepper Hot NuMex Joe E Parker
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Pepper Seeds - Hot - NuMex Joe E Parker
Starting at $2.99
Radish Seeds - Pink Summerciclemid size pouch type seed packaging for - Radish Pink Summercicle
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Radish Seeds - Pink Summercicle
Starting at $3.49
Tomato Seeds - Slicing - Momotaro Tough Boy Fight Hybridmid size pouch type seed packaging for - Tomato Slicing Momotaro Tough Boy Fight Hybrid
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Tomato Seeds - Slicing - Momotaro Tough Boy Fight Hybrid
Starting at $5.99
Tomato Seeds - Slicing - Marvel Stripesmall size packet type seed packaging for - Tomato Slicing Marvel Stripe
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Tomato Seeds - Slicing - Marvel Stripe
Starting at $2.99
Squash Seeds - Winter - Lungo de Napolismall size packet type seed packaging for - Squash Winter Lungo de Napoli
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Heirloom
Squash Seeds - Winter - Lungo de Napoli
Starting at $3.59
Gourd Seeds - Bottlemid size pouch type seed packaging for - Zinnia Magellan Series Orange
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Gourd Seeds - Bottle
Starting at $2.99
Turnip Seeds - Tennouji Kaburamid size pouch type seed packaging for - Turnip Tennouji Kabura
-50%
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Turnip Seeds - Tennouji Kabura
Starting at $1.99
Squash Seeds - Table Goldsmall size packet type seed packaging for - Squash Table Gold
-44%
Squash Seeds - Table Gold
Starting at $1.99
Lettuce IthacaLettuce Seeds - Crisphead - Ithaca
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Heirloom
Lettuce Seeds - Crisphead - Ithaca
Starting at $2.99
Cucumber Seeds - Brown Russiansmall size packet type seed packaging for - Cucumber Brown Russian
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Cucumber Seeds - Brown Russian
Starting at $3.39
Gourd Seeds - New Jang Sin - Hybridmid size pouch type seed packaging for - Gourd New Jang Sin Hybrid
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Gourd Seeds - New Jang Sin - Hybrid
Starting at $3.99
Tomato Seeds - Slicing - Cal Ace VFmid size pouch type seed packaging for - Tomato Slicing Cal Ace VF
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Tomato Seeds - Slicing - Cal Ace VF
Starting at $3.39
Cauliflower Seeds - Violetta Italiamid size pouch type seed packaging for - Cauliflower Violetta Italia
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Cauliflower Seeds - Violetta Italia
Starting at $3.29
Pepper Hot Chiltepin
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Pepper Seeds - Hot - Tepin
Starting at $3.29
Lettuce Seeds - Leaf - Maricellasmall size packet type seed packaging for - Lettuce Leaf Maricella
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Lettuce Seeds - Leaf - Maricella
Starting at $2.99
Bean Seeds - Bush - Karikachi #3 Edamame Soybeanmid size pouch type seed packaging for - Bean Bush Karikachi #3 Edamame Soybean
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Heirloom
Bean Seeds - Bush - Karikachi #3 Edamame Soybean
Starting at $3.99
Tomato Seeds - Slicing - Chef's Choice Yellow Hybrid AAS
Starting at $4.29
Amaranth Seeds - Red Army
Starting at $2.99
Asparagus Crowns - Jersey Knight Hybrid
Starting at $7.48
Lettuce Seeds - Butterhead & Bibb Mix (Organic)
Starting at $3.59
Melon Seeds - Honeydew - Orange Flesh (Organic)
Starting at $3.59
Mustard Seeds - Southern Giant Curled (Organic)
Starting at $3.59
Carrot Seeds - Lunar White (Organic)
Starting at $3.59
Horseradish Root
$19.95
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