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
2427 Items
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Cucumber Seeds - Muncher Burpless - Organicsmall size packet type seed packaging for - Cucumber Muncher Burpless Organic
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Cucumber Seeds - Muncher Burpless - Organic
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Pumpkin Seeds - Big Maxsmall size packet type seed packaging for - Pumpkin Big Max
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Sorrel Seeds - Red Veinedmid size pouch type seed packaging for - Sorrel Red Veined
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Staff Favorite
Sorrel Seeds - Red Veined
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Bean Seeds - Bush - Strikesmall size packet type seed packaging for - Bean Bush Strike
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Radish Seeds - WatermelonRadish Seeds - Watermelon
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Radish Seeds - Watermelon
Starting at $3.99
Bean Seeds - Bush - Providersmall size packet type seed packaging for - Bean Bush Provider
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Bean Seeds - Bush - Provider
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Lettuce Seeds - Romaine - Giant Caesarsmall size packet type seed packaging for - Lettuce Romaine Giant Caesar
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Bean - Broad Windsor Fava - Cover Crop Seedssmall size packet type seed packaging for - Bean Broad Windsor Fava Cover Crop
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Bean - Broad Windsor Fava - Cover Crop Seeds
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Cabbage Seeds - Late Flat Dutchmid size pouch type seed packaging for - Cabbage Late Flat Dutch
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Cucumber Seeds - Homemade PicklesCucumber Seeds - Homemade Pickles
-28%
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Cucumber Seeds - Homemade Pickles
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Bean Seeds - Bush - Roma IIsmall size packet type seed packaging for - Bean Bush Roma II
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Swiss Chard Seeds - Ruby RedSwiss Chard Seeds - Ruby Red
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Lettuce Seeds - Romaine - Frecklesmid size pouch type seed packaging for - Lettuce Romaine Freckles
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Lettuce Seeds - Romaine - Freckles
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Zinnia Seeds - Lilliput MixtureZinnia Seeds - Lilliput Mixture
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Pumpkin Seeds - Connecticut FieldPumpkin Seeds - Connecticut Field
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Pumpkin Seeds - Connecticut Field
Starting at $2.99
Thyme Seeds - Winter
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Melon Seeds - Cantaloupe - Hearts of Goldmid size pouch type seed packaging for - Melon Cantaloupe Hearts of Gold
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Melon Seeds - Cantaloupe - Hearts of Gold
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Cabbage Seeds - Savoy Perfectionsmall size packet type seed packaging for - Cabbage Savoy Perfection
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Kale Seeds - Premiermid size pouch type seed packaging for - Kale Premier
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Tomato Seeds - Cherry - Yellow Pearmid size pouch type seed packaging for - Tomato Cherry Yellow Pear
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Tomato Seeds - Cherry - Yellow Pear
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Cucumber Seeds - Sweet Success Hybridmid size pouch type seed packaging for - Cucumber Sweet Success Hybrid
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Zinnia Seeds - Zahara Series (Coated)Zinnia Seeds - Zahara Series (Coated)
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Starting at $3.89
Pepper Seeds - Hot - Bhut Jolokia Ghostsmall size packet type seed packaging for - Pepper Hot Bhut Jolokia Ghost
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Lettuce Seeds - Leaf - Oakleafmid size pouch type seed packaging for - Lettuce Leaf Oakleaf
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Lettuce Seeds - Leaf - Salad Bowl Greensmall size packet type seed packaging for - Lettuce Leaf Salad Bowl Green
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Cabbage Seeds - Early Round Dutchsmall size packet type seed packaging for - Cabbage Early Round Dutch
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Cabbage Seeds - Early Round Dutch
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Bean Seeds - Bush - Blue Lake (Organic)small size packet type seed packaging for - Bean Bush Blue Lake Organic
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Organic
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Bean Seeds - Bush - Royal Burgundymid size pouch type seed packaging for - Bean Bush Royal Burgundy
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Cucumber Seeds, Japanese - Progress - Hybrid
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Onion Seeds - Long - Ruby
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Portulaca Seeds - Double Mix
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Cucumber Seeds - Metki Pale Green Armenian Yard-Long
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