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
697 Items
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Tobacco Seeds - Comstocksmall size packet type seed packaging for - Tobacco Comstock
-0
Heirloom
Tobacco Seeds - Comstock
Starting at $3.19
Wine Cap Mushroom Sawdust Spawn (Organic)Wine Cap Mushroom Sawdust Spawn (Organic)
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Organic
Wine Cap Mushroom Sawdust Spawn (Organic)
$29.99
Swiss Chard Seeds - Flamingosmall size packet type seed packaging for - Swiss Chard Flamingo
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Heirloom
Swiss Chard Seeds - Flamingo
Starting at $2.99
Rapeseed - Canola (Organic)Rapeseed - Canola (Organic)
-0
Organic
Rapeseed - Canola (Organic)
Starting at $3.59
Echinacea Seeds - Purpurea (Organic)mid size pouch type seed packaging for - Echinacea Purpurea Organic
-0
Heirloom
Organic
Echinacea Seeds - Purpurea (Organic)
Starting at $3.99
custom packaging for Ecotone - Hydroponic Grow MatsEcotone - Hydroponic Grow Mats
-0
Staff Favorite
Ecotone - Hydroponic Grow Mats
Starting at $15.74
custom packaging for Mini Organic Self-Watering Cat Grass KitOrganic Self-Watering Cat Grass Kit
-0
Organic
Staff Favorite
Organic Self-Watering Cat Grass Kit
$14.86
Eggplant Seeds - Morden Midget (organic)
-0
Heirloom
Organic
Eggplant Seeds - Morden Midget (organic)
Starting at $4.89
Salad Burnet Herb Seeds - MicrogreensSalad Burnet Herb Seeds - Microgreens
-0
Heirloom
Salad Burnet Herb Seeds - Microgreens
Starting at $4.26
Gourd Seeds - Caveman's Clubsmall size packet type seed packaging for - Gourd Cavemans Club
-0
Heirloom
Gourd Seeds - Caveman's Club
Starting at $3.29
Bean Seeds - Bush - Jackson Wonder Limamid size pouch type seed packaging for - Zinnia Magellan Series Orange
-0
Heirloom
Bean Seeds - Bush - Jackson Wonder Lima
Starting at $4.33
Basil Seeds - Cinnamon (Organic)
-44%
Heirloom
Organic
Basil Seeds - Cinnamon (Organic)
Starting at $1.99
Radish Seeds - Pink Summerciclemid size pouch type seed packaging for - Radish Pink Summercicle
-0
Heirloom
Radish Seeds - Pink Summercicle
Starting at $3.49
Cotton Seeds - Sea Island BrownCotton Seeds - Sea Island Brown
-0
Heirloom
Cotton Seeds - Sea Island Brown
Starting at $3.39
Gourd Seeds - Bottlemid size pouch type seed packaging for - Zinnia Magellan Series Orange
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Heirloom
Gourd Seeds - Bottle
Starting at $2.99
Amaranth Seeds - All Red Leaf - Microgreens Seedsmid size pouch type seed packaging for - Amaranth All Red Leaf Microgreens
-0
Amaranth Seeds - All Red Leaf - Microgreens Seeds
Starting at $9.76
Pepper Hot Chiltepin
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Heirloom
Pepper Seeds - Hot - Tepin
Starting at $3.29
Celery Seeds - Golden Boysmall size packet type seed packaging for - Celery Golden Boy
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Heirloom
Celery Seeds - Golden Boy
Starting at $3.39
Borage Seeds (Organic) - Microgreens Seedsmid size pouch type seed packaging for - Tomato Slicing Yellow Perfection Organic
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Organic
Borage Seeds (Organic) - Microgreens Seeds
Starting at $5.03
Cardoon Seeds - Ivory Whitesmall size packet type seed packaging for - Cardoon Ivory White
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Heirloom
Cardoon Seeds - Ivory White
Starting at $2.99
Gourd Seeds - Dipper - Extra Long Handlesmall size packet type seed packaging for - Gourd Dipper Extra Long Handle
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Heirloom
Gourd Seeds - Dipper - Extra Long Handle
Starting at $2.99
China Aster Seeds - Single Rainbow MixChina Aster Seeds - Single Rainbow Mix
-0
Heirloom
China Aster Seeds - Single Rainbow Mix
Starting at $2.99
Bean Seeds - Bush - French Garden
Starting at $3.39
Corn Seeds - Popcorn - Miniature Blue
Starting at $5.55
Dianthus Seeds - Cottage Pinks
Starting at $2.99
Seed Assortment - Zone 9 Garden
$19.91
Amaranth Seeds - Red Army
Starting at $2.99
Asparagus Crowns - Jersey Knight Hybrid
Starting at $7.48
Horseradish Root
$19.95
Cauliflower Seeds - Veronica Romanesco Hybrid - Clearance Seeds
Starting at $4.20
Squash Seeds - Summer - Black Zucchini (Organic)
Starting at $3.89
Strawberry Roots - Everbearing - Eversweet Hybrid
$24.95
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