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
1330 Items
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Squash Seeds - Japanese, Winter - Sweet Mama - Hybridmid size pouch type seed packaging for - Squash Japanese Winter Sweet Mama Hybrid
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Tomato Seeds - Slicing - Momotaro Hybridmid size pouch type seed packaging for - Tomato Slicing Momotaro Hybrid
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Bean Seeds - Bush - Taylor Dwarf HorticultureBean Seeds - Bush - Taylor Dwarf Horticulture
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Corn Seeds - Dent - Truckers Favorite Whitemid size pouch type seed packaging for - Corn Dent Truckers Favorite White
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African Marigold Seeds - Antigua SeriesAfrican Marigold Seeds - Antigua Series
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Squash Seeds - Summer - Scallop Yellow Bushsmall size packet type seed packaging for - Squash Scallop Yellow Bush
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Tomato Seeds - Slicing - Super Fantastic HybridTomato Seeds - Slicing - Super Fantastic Hybrid
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Pepper Seeds - Hot - Scotch Bonnet Redmid size pouch type seed packaging for - Pepper Hot Scotch Bonnet Red
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Starting at $3.39
Cucumber Seeds - Burpless Bush Slicer F1small size packet type seed packaging for - Cucumber Burpless Bush Slicer F1
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Starting at $4.29
Corn Seeds - Dent - Truckers Favorite Yellowmid size pouch type seed packaging for - Corn Dent Truckers Favorite Yellow
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Bean Seeds - Bush - Cherokee Black Waxsmall size packet type seed packaging for - Bean Bush Cherokee Black Wax
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Cucumber Seeds - Beit Alpha F1 CMR/MMRCucumber Seeds - Beit Alpha F1 CMR/MMR
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Starting at $3.99
Eggplant Seeds - Thai Roundmid size pouch type seed packaging for - Eggplant Thai Round
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Basil Seeds - Dwarf Greeksmall size packet type seed packaging for - Basil Dwarf Greek
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Canna Seeds - Tropical SeriesCanna Seeds - Tropical Series
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African Marigold Seeds - Discovery SeriesAfrican Marigold Seeds - Discovery Series
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Watermelon Seeds - Picnic - Dixie Queenmid size pouch type seed packaging for - Watermelon Picnic Dixie Queen
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Eggplant Seeds - Japanese PicklingEggplant Seeds - Japanese Pickling
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Cucumber Seeds - Bush Cropmid size pouch type seed packaging for - Cucumber Bush Crop
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Corn Seeds - Sweet - Ambrosia Hybrid (treated)mid size pouch type seed packaging for - Corn Sweet Ambrosia Hybrid treated
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Bean Seeds - Bush -  Fordhook 242 Lima
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Tomato Seeds - Slicing - Chef's Choice Black Hybrid AASmid size pouch type seed packaging for - Tomato Slicing Chefs Choice Black Hybrid AAS
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Starting at $4.89
Cucumber Seeds - Japanese Long
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Artichoke Seeds - Purple Romagnasmall size packet type seed packaging for - Artichoke Purple Romagna
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Eggplant Seeds - Rosa Bianca - Organicsmall size packet type seed packaging for - Eggplant Rosa Bianca Organic
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Starting at $3.59
Bacopa Seeds - Utopia (MSP)Bacopa Seeds - Utopia (MSP)
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Cucumber Seeds - Housaku - Hybridmid size pouch type seed packaging for - Cucumber Housaku Hybrid
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Pumpkin Seeds - Wee-B-Littlemid size pouch type seed packaging for - Pumpkin Wee-B-Little
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Pumpkin Seeds - Show Winnermid size pouch type seed packaging for - Pumpkin Show Winner
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Melon Seeds - Casaba - Golden Beauty
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