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
2276 Items
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Chamomile Seeds - Romansmall size packet type seed packaging for - Chamomile Roman
-0
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Chamomile Seeds - Roman
Starting at $2.99
Cat Grass Seeds - Seed Blend (Organic)Cat Grass Seeds - Seed Blend (Organic)
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Bean Seeds - Pole - Oriental Yard LongBean Seeds - Pole - Oriental Yard Long
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Starting at $3.99
Bean Seeds - Bush - Pintosmall size packet type seed packaging for - Bean Bush Pinto
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Bean Seeds - Bush - Pinto
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Carrot Seeds - Little Fingersmid size pouch type seed packaging for - Carrot Little Fingers
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Bean Seeds - Bush - Tendergreen (Organic)small size packet type seed packaging for - Bean Bush Tendergreen Organic
-38%
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Organic
Bean Seeds - Bush - Tendergreen (Organic)
Starting at $2.09
Corn Seeds - Sweet - Stowells Evergreenmid size pouch type seed packaging for - Corn Sweet Stowells Evergreen
-0
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Corn Seeds - Sweet - Stowells Evergreen
Starting at $2.63
Pea - Yellow (Organic) - Microgreens SeedsPea - Yellow (Organic) - Microgreens Seeds
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Organic
Pea - Yellow (Organic) - Microgreens Seeds
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Artichoke Seeds - Green Globemid size pouch type seed packaging for - Artichoke Green Globe
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Borage - Microgreens Seedsmid size pouch type seed packaging for - Borage Microgreens
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Borage - Microgreens Seeds
Starting at $6.95
Lettuce Seeds - Leaf - Lollo Rosso (Organic)mid size pouch type seed packaging for - Lettuce Leaf Lollo Rosso Organic
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Squash Seeds - Summer - Crookneck (Organic)small size packet type seed packaging for - Squash Summer Crookneck Organic
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Squash Seeds - Summer - Crookneck (Organic)
Starting at $3.59
Bean Seeds - Pole - Qing Bainmid size pouch type seed packaging for - Bean Pole Qing Bain
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Starting at $3.99
Melon Seeds - Honeydew - Green Fleshmid size pouch type seed packaging for - Melon Honeydew Green Flesh
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Melon Seeds - Honeydew - Green Flesh
Starting at $2.99
Chinese Cabbage - Sprouting SeedsChinese Cabbage - Sprouting Seeds
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Chinese Cabbage - Sprouting Seeds
Starting at $5.11
Radish Seeds - Microgreen - Sango Purple (Organic)
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Radish Seeds - Microgreen - Sango Purple (Organic)
Starting at $3.99
Radish - Red Arrow - Microgreens SeedsRadish - Red Arrow - Microgreens Seeds
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Starting at $7.24
Kale Seeds - Lacinato (Black Tuscan)mid size pouch type seed packaging for - Kale Lacinato Black Tuscan
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Starting at $2.99
Lettuce Romaine - Cimmaron - Microgreens SeedsLettuce Romaine - Cimmaron - Microgreens Seeds
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Lettuce Romaine - Cimmaron - Microgreens Seeds
Starting at $7.12
Basil Seeds - ThaiBasil Seeds - Thai
-50%
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Basil Seeds - Thai
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Corn Seeds - Flint - Hopi Bluemid size pouch type seed packaging for - Corn Flint Hopi Blue
-39%
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Corn Seeds - Flint - Hopi Blue
Starting at $1.99
Celery Seeds - Golden Self BlanchingCelery Seeds - Golden Self Blanching
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Starting at $2.99
Culinary Herb Seeds CollectionCulinary Herb Seeds Collection
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Starting at $17.78
Kohlrabi Seeds - Purple ViennaKohlrabi Seeds - Purple Vienna
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Starting at $2.99
Wild Arugula - Herb Seedsmid size pouch type seed packaging for - Wild Arugula Herb
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Starting at $3.29
Pea Seeds - Shelling - Green Arrow (Organic)small size packet type seed packaging for - Pea Shelling Green Arrow Organic
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Starting at $3.59
Lettuce Mixed Greens - Mesclun Mix - Microgreens SeedsLettuce Mixed Greens - Mesclun Mix - Microgreens Seeds
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Lettuce Mixed Greens - Mesclun Mix - Microgreens Seeds
Starting at $7.69
Pepper Seeds - Hot - Jalapeno Mmid size pouch type seed packaging for - Pepper Hot Jalapeno M
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Pepper Seeds - Hot - Jalapeno M
Starting at $3.09
Radish - China Rose (Organic) - Microgreens Seeds
Starting at $5.97
Cucamelon Seeds - Mexican Sour Gherkin
Starting at $5.59
Fennel Seeds - Florence
Starting at $2.99
Pumpkin Seeds - Howden
Starting at $3.59
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