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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430 Items
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Pumpkin Seeds - Autumn Moon and Ghoulie Mixmid size pouch type seed packaging for - Zinnia Magellan Series Orange
-0
Pumpkin Seeds - Autumn Moon and Ghoulie Mix
Starting at $3.99
Kimchi Seed AssortmentKimchi Seed Assortment
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Kimchi Seed Assortment
$27.42
Corn Seeds - Sweet - Inspiration Hybridmid size pouch type seed packaging for - Zinnia Magellan Series Orange
-68%
Corn Seeds - Sweet - Inspiration Hybrid
Starting at $1.99
Artist Chiura Obata - Kanamachi Turnip Limited Edition Seed PacketArtist Chiura Obata - Kanamachi Turnip Limited Edition Seed Packet
-0
Heirloom
Artist Chiura Obata - Kanamachi Turnip Limited Edition Seed Packet
$3.99
Gourd Seeds - UFO F1mid size pouch type seed packaging for - Gourd UFO F1
-0
Gourd Seeds - UFO F1
Starting at $3.99
Grass Seeds - QuakingTrue Leaf Market Flower Seed packaging Bag
-0
Grass Seeds - Quaking
Starting at $3.39
Crocus Bulbs - Mixed Colors
-0
Crocus Bulbs - Mixed Colors
$12.99
Radish Seeds - Oshin - Hybridmid size pouch type seed packaging for - Radish Oshin Hybrid
-0
Radish Seeds - Oshin - Hybrid
Starting at $3.99
Radish Seeds - Sakurajima Mammothmid size pouch type seed packaging for - Radish Sakurajima Mammoth
-0
Heirloom
Radish Seeds - Sakurajima Mammoth
Starting at $3.99
Chinese Cabbage Seeds - Pagoda 70 - Hybridmid size pouch type seed packaging for - Chinese Cabbage Pagoda 70 Hybrid
-0
Chinese Cabbage Seeds - Pagoda 70 - Hybrid
Starting at $3.99
Bean Seeds - Bush - Tamba Kuro Otsubu Soybeanmid size pouch type seed packaging for - Bean Bush Tamba Kuro Otsubu Soybean
-0
Bean Seeds - Bush - Tamba Kuro Otsubu Soybean
Starting at $3.99
Turnip Seeds - Sugukinamid size pouch type seed packaging for - Turnip Sugukina
-0
Heirloom
Turnip Seeds - Sugukina
Starting at $3.99
Radish Seeds - Iwai Daikonmid size pouch type seed packaging for - Radish Iwai Daikon
-0
Heirloom
Radish Seeds - Iwai Daikon
Starting at $3.99
Daffodil Bulbs - Large Cupped 'Ice Follies'
-0
Daffodil Bulbs - Large Cupped 'Ice Follies'
Starting at $21.99
Radish Seeds - Nerimamid size pouch type seed packaging for - Radish Nerima
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Heirloom
Radish Seeds - Nerima
Starting at $3.99
Plectranthus Seeds - Silver Shield (Pelleted)mid size pouch type seed packaging for - Plectranthus Silver Shield Pelleted
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Plectranthus Seeds - Silver Shield (Pelleted)
Starting at $5.89
Peony Bulbs - Duchess de Nemours
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Heirloom
Peony Bulbs - Duchess de Nemours
Starting at $16.99
California Poppy Seeds - Carmine Kingmid size pouch type seed packaging for - Zinnia Magellan Series Orange
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California Poppy Seeds - Carmine King
Starting at $2.99
Turnip Seeds - Just Right - Hybridmid size pouch type seed packaging for - Turnip Just Right Hybrid
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Turnip Seeds - Just Right - Hybrid
Starting at $4.49
Daffodil Bulbs - Trumpet 'Mount Hood'
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Daffodil Bulbs - Trumpet 'Mount Hood'
Starting at $19.99
Peony Bulbs - SorbetPeony Bulbs - Sorbet
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Peony Bulbs - Sorbet
Starting at $16.99
Anemone Bulbs - Carmel White
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Anemone Bulbs - Carmel White
Starting at $29.99
Seed Potatoes - Lamoka (Organic)
Starting at $9.78
Begonia Tubers - Bi-Color Picotee Mixture
$9.00 $17.99
Gladiolus Bulbs - Glad you Are Here Mixture
$7.00 $13.99
Gladiolus Bulbs - Dazzling Tangerine Mixture
$7.00 $13.99
Seed Potatoes - Cal White (Organic)
Starting at $9.78
Turnip Seeds - Hinona Kabu
Starting at $3.99
Calla Lily Bulbs - Mixture
$14.00 $27.99
Cosmos Seeds - Dwarf Sensation Mix - Organic
Starting at $3.99
Bean Seeds - Pole - Musica
Starting at $4.19
Endive Seeds - Castelfranco - Clearance Seeds
Starting at $4.54
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