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
397 Items
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Stipa Seeds - Pony Tailsmid size pouch type seed packaging for - Stipa Pony Tails
-0
Stipa Seeds - Pony Tails
$19.91
Onion Seeds - Red Of Florencemid size pouch type seed packaging for - Onion Red Of Florence
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Heirloom
Onion Seeds - Red Of Florence
Starting at $2.99
Gourd Seeds - Harvest Wings F1mid size pouch type seed packaging for - Gourd Harvest Wings F1
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Gourd Seeds - Harvest Wings F1
Starting at $3.99
Radish Seeds - Giant Luo Buomid size pouch type seed packaging for - Radish Giant Luo Buo
-0
Heirloom
Radish Seeds - Giant Luo Buo
Starting at $3.99
Pumpkin Seeds - Baby Boo (treated)Pumpkin Seeds - Baby Boo (treated)
-0
Heirloom
Pumpkin Seeds - Baby Boo (treated)
Starting at $44.29
Tomato Seeds - Slicing - Micado Violetter (Organic)mid size pouch type seed packaging for - Tomato Slicing Yellow Perfection Organic
-0
Heirloom
Organic
Tomato Seeds - Slicing - Micado Violetter (Organic)
Starting at $3.59
Watermelon Seeds - Tom Watson
-0
Heirloom
Watermelon Seeds - Tom Watson
Starting at $2.99
Pumpkin Seeds - Early Harvest F1small size packet type seed packaging for - Pumpkin Early Harvest F1
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Pumpkin Seeds - Early Harvest F1
Starting at $4.29
Tomato Seeds - Slicing - Hillbillymid size pouch type seed packaging for - Tomato Slicing Hillbilly
-0
Heirloom
Tomato Seeds - Slicing - Hillbilly
Starting at $2.99
Cumin Seeds - Black
-0
Heirloom
Cumin Seeds - Black
Starting at $2.99
Tomato Seeds - Paste - Orange Romasmall size packet type seed packaging for - Tomato Paste Orange Roma
-0
Heirloom
Tomato Seeds - Paste - Orange Roma
Starting at $2.99
Pumpkin Seeds - Autumn Gold Hybridmid size pouch type seed packaging for - Pumpkin Autumn Gold Hybrid
-0
AAS Winner
Pumpkin Seeds - Autumn Gold Hybrid
Starting at $4.49
Tomato Seeds - Slicing - Brandywine Red Potato Leafmid size pouch type seed packaging for - Zinnia Magellan Series Orange
-0
Heirloom
Tomato Seeds - Slicing - Brandywine Red Potato Leaf
Starting at $2.99
Pumpkin Seeds - Luminamid size pouch type seed packaging for - Zinnia Magellan Series Orange
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Heirloom
Pumpkin Seeds - Lumina
Starting at $3.39
Tomato Seeds - Slicing - Chef's Choice White Hybridmid size pouch type seed packaging for - Tomato Slicing Chefs Choice White Hybrid
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Tomato Seeds - Slicing - Chef's Choice White Hybrid
Starting at $4.29
Tulip Bulbs - Darwin Hybrid - Mixed
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Tulip Bulbs - Darwin Hybrid - Mixed
Starting at $17.99
Watermelon Seeds - Picnic - Greybellesmall size packet type seed packaging for - Watermelon Picnic Greybelle
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Heirloom
Watermelon Seeds - Picnic - Greybelle
Starting at $2.99
Tulip Bulbs - Double Early - Mixed
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Tulip Bulbs - Double Early - Mixed
Starting at $18.99
Pepper Seeds - Hot - Habanero Blend
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Pepper Seeds - Hot - Habanero Blend
Starting at $3.09
Melon Seeds - Cantaloupe - Iroquois (Organic)small size packet type seed packaging for - Melon Cantaloupe Iroquois Organic
-0
Heirloom
Organic
Melon Seeds - Cantaloupe - Iroquois (Organic)
Starting at $3.59
Tomato Seeds - Slicing - Chef's Choice Green Hybrid AASmid size pouch type seed packaging for - Tomato Slicing Chefs Choice Green Hybrid AAS
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AAS Winner
Tomato Seeds - Slicing - Chef's Choice Green Hybrid AAS
Starting at $4.29
Watermelon Seeds - Picnic - Garrisoniansmall size packet type seed packaging for - Watermelon Picnic Garrisonian
-0
Heirloom
Watermelon Seeds - Picnic - Garrisonian
Starting at $3.29
Watermelon Seeds - Picnic - Striped Klondike R7small size packet type seed packaging for - Watermelon Picnic Striped Klondike R7
-0
Heirloom
Watermelon Seeds - Picnic - Striped Klondike R7
Starting at $2.99
Tomato Seeds - Slicing - Nebraska Weddingmid size pouch type seed packaging for - Tomato Slicing Nebraska Wedding
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Heirloom
Tomato Seeds - Slicing - Nebraska Wedding
Starting at $2.99
Gourd Seeds - Pear (Bi-Color)
-0
Heirloom
Gourd Seeds - Pear (Bi-Color)
Starting at $2.99
Melon Seeds - Vine Peachsmall size packet type seed packaging for - Melon Vine Peach
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Heirloom
Melon Seeds - Vine Peach
Starting at $3.29
Melon Seeds - Honeydew - Golden Honeymoonsmall size packet type seed packaging for - Melon Honeydew Golden Honeymoon
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Heirloom
Melon Seeds - Honeydew - Golden Honeymoon
Starting at $3.29
Tomato Seeds - Slicing - Zapotec Oaxacan Ribbed
Starting at $2.99
Cerastium Seeds - Snow In Summer - Biebersteinii White
Starting at $2.99
Melon Seeds - Casaba - Sungold
Starting at $2.99
Melon Seeds - Sakata's Sweet
Starting at $3.99
Gourd Seeds - Extra Long Snake
Starting at $3.99
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