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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74 Items
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Wildflower Seeds - Annual MixWildflower Seeds - Annual Mix
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Wildflower Seeds - Annual Mix
Starting at $3.99
Hyacinth Bulbs - Blue Jacket
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Hyacinth Bulbs - Blue Jacket
Starting at $13.99
Columbine Seeds - Blue and White Swanmid size pouch type seed packaging for - Columbine Blue and White Swan
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Columbine Seeds - Blue and White Swan
Starting at $6.49
Bearded Iris Bulbs -  Dark Blue
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Bearded Iris Bulbs - Dark Blue
Starting at $14.99
Corn Seeds - Popcorn - Calico
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Heirloom
Corn Seeds - Popcorn - Calico
Starting at $3.09
Anemone Bulbs - Galilee Blue
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Anemone Bulbs - Galilee Blue
Starting at $29.99
Kale Seeds - Black Magic (Organic)
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Organic
Kale Seeds - Black Magic (Organic)
Starting at $3.59
Bearded Iris Bulbs -  Light Blue
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Bearded Iris Bulbs - Light Blue
Starting at $14.99
Blueberry Roots - Earliblue
$19.99
Blueberry Roots - Northland
$19.99
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