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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
2353 Items
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Gourd Seeds - Fong Show - Hybridmid size pouch type seed packaging for - Gourd Fong Show Hybrid
-0
Gourd Seeds - Fong Show - Hybrid
Starting at $3.99
Pak Choi Seeds - Summer Zest - Hybridmid size pouch type seed packaging for - Pak Choi Summer Zest Hybrid
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Pak Choi Seeds - Summer Zest - Hybrid
Starting at $3.99
Tomato Seeds - Slicing - Giant Belgium Pinksmall size packet type seed packaging for - Tomato Slicing Giant Belgium Pink
-0
Heirloom
Tomato Seeds - Slicing - Giant Belgium Pink
Starting at $2.99
Radish Seeds - Korean - Alpine Gold - Hybridmid size pouch type seed packaging for - Radish Korean Alpine Gold Hybrid
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Radish Seeds - Korean - Alpine Gold - Hybrid
Starting at $3.99
Radish Seeds - Halloween Mixsmall size packet type seed packaging for - Radish Halloween Mix
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Radish Seeds - Halloween Mix
Starting at $2.99
Beet Seeds - Lutz Green Leafsmall size packet type seed packaging for - Beet Lutz Green Leaf
-0
Heirloom
Beet Seeds - Lutz Green Leaf
Starting at $2.99
Pepper Seeds - Sweet - Manganjimid size pouch type seed packaging for - Pepper Sweet Manganji
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Heirloom
Pepper Seeds - Sweet - Manganji
Starting at $3.99
Yu Choy Sum Seeds - Kosaitai - Hon Tsai Taimid size pouch type seed packaging for - Yu Choy Sum Kosaitai Hon Tsai Tai
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Heirloom
Yu Choy Sum Seeds - Kosaitai - Hon Tsai Tai
Starting at $3.99
Red Lentils (Organic) - Bulk Grains & FoodsRed Lentils (Organic) - Bulk Grains & Foods
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Organic
Red Lentils (Organic) - Bulk Grains & Foods
Starting at $9.96
Watermelon Seeds - Picnic - AU Producersmall size packet type seed packaging for - Watermelon Picnic AU Producer
-0
Heirloom
Watermelon Seeds - Picnic - AU Producer
Starting at $3.59
Cucumber Seeds - Crystal Applesmall size packet type seed packaging for - Cucumber Crystal Apple
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Heirloom
Cucumber Seeds - Crystal Apple
Starting at $2.99
Seasonal Seed Assortment - SummerSeasonal Seed Assortment - Summer
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Seasonal Seed Assortment - Summer
$20.73
Tomato Seeds - Slicing - Old German (Organic)mid size pouch type seed packaging for - Tomato Slicing Yellow Perfection Organic
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Heirloom
Organic
Tomato Seeds - Slicing - Old German (Organic)
Starting at $3.59
Carrot Seeds - Parisian - Organicsmall size packet type seed packaging for - Carrot Parisian Organic
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Organic
Carrot Seeds - Parisian - Organic
Starting at $3.59
Bean Seeds - Bush - Fava (Organic)Bean Seeds - Bush - Fava (Organic)
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Heirloom
Organic
Bean Seeds - Bush - Fava (Organic)
Starting at $3.59
Cucumber Seeds - SumterCucumber Seeds - Sumter
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Heirloom
Cucumber Seeds - Sumter
Starting at $2.99
Radish Seeds - German Giant - Organicsmall size packet type seed packaging for - Radish German Giant Organic
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Heirloom
Organic
Radish Seeds - German Giant - Organic
Starting at $3.59
Eggplant Seeds - Petch SiamEggplant Seeds - Petch Siam
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Heirloom
Eggplant Seeds - Petch Siam
Starting at $3.99
Bean Seeds - Pole - Purple Moon Hyacinthmid size pouch type seed packaging for - Bean Pole Purple Moon Hyacinth
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Bean Seeds - Pole - Purple Moon Hyacinth
Starting at $3.99
Swiss Chard Seeds - Pink Lipstickmid size pouch type seed packaging for - Zinnia Magellan Series Orange
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Swiss Chard Seeds - Pink Lipstick
Starting at $2.99
Tomato Seeds - Slicing - Chef's Choice Red Hybrid AASmid size pouch type seed packaging for - Tomato Slicing Chefs Choice Red Hybrid AAS
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Tomato Seeds - Slicing - Chef's Choice Red Hybrid AAS
Starting at $4.59
Squash Seeds - Summer - Trieste White ZucchiniSquash Seeds - Summer - Trieste White Zucchini
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Squash Seeds - Summer - Trieste White Zucchini
Starting at $2.99
Radish Seeds - Chinese - Green Meat Luobomid size pouch type seed packaging for - Radish Chinese Green Meat Luobo
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Heirloom
Radish Seeds - Chinese - Green Meat Luobo
Starting at $3.99
Radish Seeds - Black Spanish Round - Organicsmall size packet type seed packaging for - Radish Black Spanish Round Organic
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Heirloom
Organic
Radish Seeds - Black Spanish Round - Organic
Starting at $3.59
Eggplant Seeds - Konasumid size pouch type seed packaging for - Eggplant Konasu
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Heirloom
Eggplant Seeds - Konasu
Starting at $3.99
Melon Seeds - Bananasmall size packet type seed packaging for - Melon Banana
-33%
Heirloom
Melon Seeds - Banana
Starting at $1.99
Mustard Seeds - WasabiMustard Seeds - Wasabi
-0
Mustard Seeds - Wasabi
Starting at $3.99
Melon Seeds - Casaba - Bidwellmid size pouch type seed packaging for - Melon Casaba Bidwell
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Heirloom
Melon Seeds - Casaba - Bidwell
Starting at $3.39
Watermelon Seeds - Icebox - Hime Kansen Hybrid
Starting at $3.99
Corn Seeds - Dent - Ornamental - Bloody Butcher
Starting at $3.29
Pepper Seeds - Hot - Scotch Bonnet Yellow
Starting at $2.99
Competition Pumpkin Seeds - 400 lb plus
$9.97
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