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
2354 Items
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Bean Seeds - Bush - Royalty Purple Pod (Organic)mid size pouch type seed packaging for - Bean Bush Royalty Purple Pod Organic
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Starting at $3.59
Mustard Seeds - Mizuna Red LeafMustard Seeds - Mizuna Red Leaf
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Burdock Seeds - Chikosmall size packet type seed packaging for - Burdock Chiko
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Burdock Seeds - Chiko
Starting at $2.99
Turnip Seeds - Gold Ballsmall size packet type seed packaging for - Turnip Gold Ball
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Turnip Seeds - Gold Ball
Starting at $1.99
Tomato Seeds - Cherry - Tiny Timmid size pouch type seed packaging for - Zinnia Magellan Series Orange
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Tomato Seeds - Cherry - Tiny Tim
Starting at $3.59
Pepper Seeds - Sweet - Pretty N Sweet Hybridmid size pouch type seed packaging for - Pepper Sweet Pretty N Sweet Hybrid
-50%
AAS Winner
Pepper Seeds - Sweet - Pretty N Sweet Hybrid
Starting at $1.99
Swiss Chard Seeds - Rhubarbmid size pouch type seed packaging for - Swiss Chard Rhubarb
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Heirloom
Swiss Chard Seeds - Rhubarb
Starting at $2.99
Tomato Seeds - Slicing - Dutchmansmall size packet type seed packaging for - Tomato Slicing Dutchman
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Tomato Seeds - Slicing - Dutchman
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Sorghum Seeds - Multicolored Broomcornmid size pouch type seed packaging for - Sorghum Multicolored Broomcorn
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Staff Favorite
Sorghum Seeds - Multicolored Broomcorn
Starting at $2.99
Squash Winter Cushaw Green Stripedmid size pouch type seed packaging for - Squash Winter Cushaw Green Striped
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Squash Seeds - Winter - Cushaw Green Striped
Starting at $2.99
Melon Seeds - Piel de SapoMelon Seeds - Piel de Sapo
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Melon Seeds - Piel de Sapo
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Gourd Seeds - Speckled Swansmall size packet type seed packaging for - Gourd Speckled Swan
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Gourd Seeds - Speckled Swan
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Seed Assortment - Mexican SalsaSeed Assortment - Mexican Salsa
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Seed Assortment - Mexican Salsa
Starting at $13.12
Pepper Seeds - Sweet - Golden Cal Wonder (Organic)small size packet type seed packaging for - Pepper Sweet Golden Cal Wonder Organic
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Starting at $3.79
Garlic Bulbs - Fall - Softneck - Nootka RoseGarlic Bulbs - Fall - Softneck - Nootka Rose
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Garlic Bulbs - Fall - Softneck - Nootka Rose
$16.88
Fennel Seeds - Sweetsmall size packet type seed packaging for - Fennel Sweet
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Fennel Seeds - Sweet
Starting at $2.99
Pinto Beans - Bulk Grains & Foodsmid size pouch type seed packaging for - Pinto Beans Bulk Grains & Foods
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Pinto Beans - Bulk Grains & Foods
Starting at $10.34
Pepper Seeds - Hot - Thai - Prik Munmid size pouch type seed packaging for - Pepper Hot Thai Prik Mun
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Starting at $3.99
Garlic Bulbs - Fall - Hardneck - Purple GlazerGarlic Bulbs - Fall - Hardneck - Purple Glazer
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$16.88
Cardoon Seedssmall size packet type seed packaging for - Cardoon
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Cardoon Seeds
Starting at $2.99
Tomato Seeds - Cherry - Currant Yellowsmall size packet type seed packaging for - Tomato Cherry Currant Yellow
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Tomato Seeds - Cherry - Currant Yellow
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Lettuce Seeds - Tangosmall size packet type seed packaging for - Lettuce Tango
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Lettuce Seeds - Tango
Starting at $2.99
Watermelon Seeds - Picnic - Kleckley's Sweetsmall size packet type seed packaging for - Watermelon Picnic Kleckleys Sweet
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Watermelon Seeds - Picnic - Kleckley's Sweet
Starting at $2.99
Leek Seeds - Giant MusselburghLeek Seeds - Giant Musselburgh
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Watermelon Seeds - Icebox - Yellow Petitesmall size packet type seed packaging for - Watermelon Icebox Yellow Petite
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Watermelon Seeds - Icebox - Yellow Petite
Starting at $3.79
Squash Seeds - Winter - Queensland Bluesmall size packet type seed packaging for - Squash Winter Queensland Blue
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Squash Seeds - Winter - Queensland Blue
Starting at $3.79
Mustard Seeds - Summer Fest Komatsuna Hybridmid size pouch type seed packaging for - Mustard Summer Fest Komatsuna Hybrid
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Bean Seeds - Pole - Purple Mart Tsu In Yard...
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Seed Potatoes - Spring - Red Pontiac (Organic)
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Swiss Chard Seeds - Yellow
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Pepper Seeds - Sweet - Rainbow Bell Blend
Starting at $2.99
Kale Seeds - Garden Blend
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