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
307 Items
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Peony Bulbs - Dr. Alexander Fleming
-0
Peony Bulbs - Dr. Alexander Fleming
Starting at $15.99
Daffodil Bulbs - Large Cupped 'Carlton'
-0
Daffodil Bulbs - Large Cupped 'Carlton'
Starting at $19.99
Alyssum Seeds - Mountain of Goldmid size pouch type seed packaging for - Alyssum Mountain of Gold
-0
Alyssum Seeds - Mountain of Gold
Starting at $3.79
Bellis (English Daisy) Seeds - MixedBellis (English Daisy) Seeds - Mixed
-0
Bellis (English Daisy) Seeds - Mixed
Starting at $3.39
Hyacinth Bulbs - Blue Jacket
-0
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
-0
Columbine Seeds - Blue and White Swan
Starting at $6.49
Crocus Bulbs - Mixed Colors
-0
Crocus Bulbs - Mixed Colors
$12.99
Tulip Bulbs - Darwin Hybrid - Apeldoorn's Elite
-0
Tulip Bulbs - Darwin Hybrid - Apeldoorn's Elite
Starting at $17.99
Daffodil Bulbs - Large Cupped 'Ice Follies'
-0
Daffodil Bulbs - Large Cupped 'Ice Follies'
Starting at $21.99
Arabis Seeds - Spring Charmmid size pouch type seed packaging for - Arabis Spring Charm
-63%
Arabis Seeds - Spring Charm
Starting at $1.99
Peony Bulbs - Duchess de Nemours
-0
Heirloom
Peony Bulbs - Duchess de Nemours
Starting at $16.99
Hyacinth Bulbs - Gipsy Princess
-0
Hyacinth Bulbs - Gipsy Princess
Starting at $13.99
Grape Hyacinth Bulbs - Muscari Armeniacum
-0
Heirloom
Grape Hyacinth Bulbs - Muscari Armeniacum
Starting at $19.99
Tulip Bulbs - Darwin Hybrid - Red Impression
-0
Tulip Bulbs - Darwin Hybrid - Red Impression
Starting at $17.99
Daffodil Bulbs - Trumpet 'Mount Hood'
-0
Daffodil Bulbs - Trumpet 'Mount Hood'
Starting at $19.99
Bearded Iris Bulbs -  Red
-0
Bearded Iris Bulbs - Red
Starting at $14.99
Peony Bulbs - SorbetPeony Bulbs - Sorbet
-0
Peony Bulbs - Sorbet
Starting at $16.99
Bearded Iris Bulbs -  Dark Blue
-0
Bearded Iris Bulbs - Dark Blue
Starting at $14.99
Daffodil Bulbs - Mixed
$19.99
Asparagus Crowns - Millenium
Starting at $9.48
Begonia Tubers - Samba Pastel Mixture
$9.70 $19.39
Begonia Tubers - Bi-Color Picotee Mixture
$9.00 $17.99
Rhubarb Crowns - Crimson Red
Starting at $13.98
Dahlia Bulbs - Arabian Night
$9.00 $17.99
Dahlia Bulbs - Dinnerplate - Thomas A. Edison
$17.99
Calla Lily Bulbs - Mixture
$14.00 $27.99
Grape Roots - Seedless - Concord
$10.50 $20.99
Raspberry Roots - Fall Gold
$18.99
Grape Roots - Seedless - Canadice
$20.99
Blackberry Roots - Chester
$21.99
Ranunculus Bulbs - Aviv Red
$16.99
Blueberry Roots - Earliblue
$19.99
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