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
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Oats and Peas Cover Crop Seed MixOats and Peas Cover Crop Seed Mix
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Beet Rainbow Blend Compmid size pouch type seed packaging for - Beet Rainbow Blend Microgreen
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Corn Seeds - Popcorn - Robust Yellow Hulless F1 Hybridmid size pouch type seed packaging for - Corn Popcorn Robust Yellow Hulless Hybrid
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Corn Seeds - Sweet - Silver King F1 Hybridmid size pouch type seed packaging for - Corn Sweet Silver King Hybrid
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custom packaging for Deluxe Sprout Growing KitDeluxe Sprout Growing Kit
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Onion Seeds - Bunching - Warrior AASsmall size packet type seed packaging for - Onion Bunching Warrior AAS
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Mustard Seeds - Tatsoi
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Coleus Seeds - Wizard Series (Pelleted)Coleus Seeds - Wizard Series (Pelleted)
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Bean Seeds - Bush - California Black-Eye Cowpeassmall size packet type seed packaging for - Bean Bush California Black-Eye Cowpeas
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French Marigold Seeds - Bonanza Series (Coated)French Marigold Seeds - Bonanza Series (Coated)
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Corn Seeds - Flint - Indianmid size pouch type seed packaging for - Corn Ornamental Indian
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Onion Seeds - Short - Yellow Granex PRR HybridOnion Seeds - Short - Yellow Granex PRR Hybrid
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Amaranthus Seeds - Elephant Head (Organic)small size packet type seed packaging for - Amaranthus Elephant Head Organic
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All Perennial Flower Seeds MixAll Perennial Flower Seeds Mix
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Tomato Seeds - Slicing - Heirloom Rainbow Blend (Organic)mid size pouch type seed packaging for - Tomato Slicing Heirloom Rainbow Blend Organic
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Seed Assortment: Basic Dozen MicrogreensSeed Assortment: Basic Dozen Microgreens
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Basil Seeds - Italian Large Leaf - Microgreens SeedsBasil Seeds - Italian Large Leaf - Microgreens Seeds
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Alyssum Seeds - Royal Carpetmid size pouch type seed packaging for - Alyssum Royal Carpet
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Digitalis (Foxglove) Seeds - Mixed Colormid size pouch type seed packaging for - Digitalis Foxglove Mixed Color
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Bean Seeds - Bush - Aquadulce Favamid size pouch type seed packaging for - Bean Bush Aquadulce Fava
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Squash Seeds - Summer - Early Prolific Straightneck (Organic)small size packet type seed packaging for - Squash Summer Early Prolific Straightneck Organic
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Pepper Seeds - Sweet - Gypsy F1 HybridPepper Seeds - Sweet - Gypsy F1 Hybrid
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Thyme Seeds - Winter (Organic)small size packet type seed packaging for - Thyme Winter Organic
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Cosmos Seeds - Bright Lightsmid size pouch type seed packaging for - Cosmos Bright Lights
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Echinacea Seeds - Cheyenne Spiritmid size pouch type seed packaging for - Echinacea Cheyenne Spirit
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Shasta Daisy Seeds - Alaskamid size pouch type seed packaging for - Shasta Daisy Alaska
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