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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
2354 Items
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Gourd Seeds - Cucuzzi (Italian Edible)mid size pouch type seed packaging for - Gourd Cucuzzi Italian Edible
-41%
Heirloom
Gourd Seeds - Cucuzzi (Italian Edible)
Starting at $1.99
Radish Seeds - Golden Heliossmall size packet type seed packaging for - Radish Golden Helios
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Organic Heirloom Seed Assortment - 10 PackSeed Assortment Organic Vegetable
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$23.52
Melon Seeds - Japanese - Ichiba Kouji Hybrid
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Melon Seeds - Japanese - Ichiba Kouji Hybrid
Starting at $3.99
Tomato Seeds - Cherry - Chadwick Cherry (Organic)mid size pouch type seed packaging for - Tomato Slicing Yellow Perfection Organic
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Organic
Tomato Seeds - Cherry - Chadwick Cherry (Organic)
Starting at $3.59
Chinese Toon Seeds - North Redmid size pouch type seed packaging for - Chinese Toon North Red
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Chinese Toon Seeds - North Red
Starting at $3.99
Seed Starter Kit Mexican Salsa
Seed Starter Kit Mexican Salsa
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Seed Starter Kit - Mexican Salsa
Starting at $18.97
Beet Seeds - Crosby Egyptian - Organicsmall size packet type seed packaging for - Beet Crosby Egyptian Organic
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Organic
Beet Seeds - Crosby Egyptian - Organic
Starting at $3.59
Pepper Seeds - Hot - Birdseye ChiliPepper Seeds - Hot - Birdseye Chili
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Pepper Seeds - Hot - Birdseye Chili
Starting at $3.79
Squash Seeds - Winter - Delicata Bush AASsmall size packet type seed packaging for - Squash Winter Delicata Bush AAS
-46%
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Squash Seeds - Winter - Delicata Bush AAS
Starting at $1.99
Endive Seeds - Green Curled Ruffecmid size pouch type seed packaging for - Endive Green Curled Ruffec
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Endive Seeds - Green Curled Ruffec
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Tomato Seeds - Slicing - Caribemid size pouch type seed packaging for - Tomato Slicing Caribe
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Tomato Seeds - Slicing - Caribe
Starting at $1.05
Cucumber Seeds - Saladmore Bush Hybrid F1small size packet type seed packaging for - Cucumber Saladmore Bush Hybrid F1
-50%
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Cucumber Seeds - Saladmore Bush Hybrid F1
Starting at $1.99
Tomatillo Seeds - Cape Gooseberry Large Fruitsmall size packet type seed packaging for - Tomatillo Cape Gooseberry Large Fruit
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Tomatillo Seeds - Cape Gooseberry Large Fruit
Starting at $2.99
Cucumber Seeds - Suyo Long (Organic)
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Cucumber Seeds - Suyo Long (Organic)
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Mustard - Tat Soi - Black Knight
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Mustard - Tat Soi - Black Knight
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Lettuce Seeds - Batavian, Great Lakes 118mid size pouch type seed packaging for - Lettuce Batavian Great Lakes 118
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Lettuce Seeds - Batavian, Great Lakes 118
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Endive Seeds - Broadleaf Batavianmid size pouch type seed packaging for - Endive Broadleaf Batavian
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Endive Seeds - Broadleaf Batavian
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Swiss Chard Seeds - Orangemid size pouch type seed packaging for - Swiss Chard Orange
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Swiss Chard Seeds - Orange
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Bean Seeds - Black Garbanzo - Organic - SproutingBean Seeds - Black Garbanzo - Organic - Sprouting
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Pea Seeds - Snap - CascadiaPea Seeds - Snap - Cascadia
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Radish Seeds - Chinese - Starburst - Hybridmid size pouch type seed packaging for - Radish Chinese Starburst Hybrid
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Radish Seeds - Chinese - Starburst - Hybrid
Starting at $3.99
Bean Seeds - Bush - Harvestersmall size packet type seed packaging for - Bean Bush Harvester
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Bean Seeds - Bush - Harvester
Starting at $2.99
Kale Seeds - Ethiopianmid size pouch type seed packaging for - Kale Ethiopian
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Kale Seeds - Ethiopian
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Swiss Chard Seeds - Magenta Sunsetmid size pouch type seed packaging for - Swiss Chard Magenta Sunset
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Swiss Chard Seeds - Magenta Sunset
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Pepper Seeds - Sweet - Jimmy Nardellosmall size packet type seed packaging for - Pepper Sweet Jimmy Nardello
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Squash Seeds - Summer - Zucchini Italian Stripedmid size pouch type seed packaging for - Squash Summer Zucchini Italian Striped
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Pepper Seeds - Sweet - Chinese Giantmid size pouch type seed packaging for - Pepper Sweet Chinese Giant
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Pepper Seeds - Sweet - Chinese Giant
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Pepper Seeds - Hot - Chiltepin
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Tomato Seeds - Slicing - Brandywine Black Potato Leaf (Organic)
Starting at $4.79
Pepper Seeds - Hot - Chile De Arbol
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Tomato Seeds - Paste - San Marzano Indeterminate (Organic)
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