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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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National Wildflower Collection - 6 Wildflower Mixes for PollinatorsNational Wildflower Collection - 6 Wildflower Mixes for Pollinators
-0
Staff Favorite
National Wildflower Collection - 6 Wildflower Mixes for Pollinators
$48.10
Dichondra Seeds - Emerald Falls (Multi-Seed Pelleted)mid size pouch type seed packaging for - Dichondra Emerald Falls Multi-Pelleted
-0
Dichondra Seeds - Emerald Falls (Multi-Seed Pelleted)
$21.50
Coreopsis Seeds - Sunfiremid size pouch type seed packaging for - Coreopsis Sunfire
-0
Coreopsis Seeds - Sunfire
Starting at $3.69
Stipa Seeds - Pony Tailsmid size pouch type seed packaging for - Stipa Pony Tails
-0
Stipa Seeds - Pony Tails
$19.91
Penstemon Seeds - Palmerssmall size packet type seed packaging for - Penstemon Palmers
-0
Penstemon Seeds - Palmers
Starting at $2.99
Wildflower Seeds - Deer Resistant MixWildflower Seeds - Deer Resistant Mix
-0
Wildflower Seeds - Deer Resistant Mix
Starting at $3.99
Lunaria Seeds - Money PlantLunaria Seeds - Money Plant
-0
Lunaria Seeds - Money Plant
Starting at $2.99
Sedum Seeds - Voodoo (Pelleted)mid size pouch type seed packaging for - Sedum Voodoo Pelleted
-0
Sedum Seeds - Voodoo (Pelleted)
Starting at $3.59
Shasta Daisy Seeds - Silver Princessmid size pouch type seed packaging for - Shasta Daisy Silver Princess
-0
Shasta Daisy Seeds - Silver Princess
Starting at $2.99
Garlic Chives Seeds - Geisha AAS
-0
AAS Winner
Heirloom
Garlic Chives Seeds - Geisha AAS
Starting at $3.79
Arabis Seeds - Snow Capmid size pouch type seed packaging for - Arabis Snow Cap
-0
Arabis Seeds - Snow Cap
Starting at $2.99
Oriental Poppy Seeds - Allegromid size pouch type seed packaging for - Oriental Poppy Allegro
-0
Oriental Poppy Seeds - Allegro
Starting at $3.39
Tulip Bulbs - Darwin Hybrid - Mixed
-0
Tulip Bulbs - Darwin Hybrid - Mixed
Starting at $17.99
Festuca Seeds - Festina (Pelleted)mid size pouch type seed packaging for - Festuca Festina Pelleted
-0
Festuca Seeds - Festina (Pelleted)
Starting at $5.83
Armeria Seeds - Maritima Seriesmid size pouch type seed packaging for - Armeria Maritima Series
-0
Armeria Seeds - Maritima Series
Starting at $3.29
Allium Bulbs - Purple Sensation
-0
Allium Bulbs - Purple Sensation
Starting at $12.99
Heuchera Seeds - Ruby Bells (Pelleted)mid size pouch type seed packaging for - Heuchera Ruby Bells Pelleted
-0
Heuchera Seeds - Ruby Bells (Pelleted)
Starting at $3.99
Tulip Bulbs - Double Early - Mixed
-0
Tulip Bulbs - Double Early - Mixed
Starting at $18.99
Tulip Bulbs - Double Late - Mixed
-0
Tulip Bulbs - Double Late - Mixed
Starting at $18.99
Sedum Seeds - Acre Golden Carpet
-0
Sedum Seeds - Acre Golden Carpet
Starting at $3.29
Peony Bulbs - Coral Sunset
-0
Peony Bulbs - Coral Sunset
Starting at $22.99
Campanula Seeds - Clips Series - White (Pelleted)mid size pouch type seed packaging for - Campanula Clips Series White Pelleted
-0
Campanula Seeds - Clips Series - White (Pelleted)
Starting at $3.29
Peony Bulbs - Shirley Temple
-0
Peony Bulbs - Shirley Temple
Starting at $16.99
Hyacinth Bulbs - Mixed
-0
Hyacinth Bulbs - Mixed
Starting at $13.99
Strawberry Roots - Everbearing - Seascape Hybrid
$24.95
Columbine Seeds - Double Mixed
Starting at $2.99
Lupine Seeds - Sundial
Starting at $2.99
Strawberry Roots - June Bearing - Allstar Hybrid
$12.48 $24.95
Cerastium Seeds - Snow In Summer - Biebersteinii White
Starting at $2.99
Strawberry Roots - June Bearing - Chandler Hybrid
$12.48 $24.95
Arabis Seeds - Compinkie
Starting at $4.79
Iberis (Candytuft) Seeds - Whiteout
Starting at $5.39
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