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
136 Items
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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
Peony Bulbs - Coral Sunset
-0
Peony Bulbs - Coral Sunset
Starting at $22.99
Peony Bulbs - Shirley Temple
-0
Peony Bulbs - Shirley Temple
Starting at $16.99
Cotton Seeds - Brown KingCotton Seeds - Brown King
-0
Cotton Seeds - Brown King
Starting at $3.39
Peony Bulbs - Dr. Alexander Fleming
-0
Peony Bulbs - Dr. Alexander Fleming
Starting at $15.99
Asparagus Fern Seeds - Meyeriimid size pouch type seed packaging for - Asparagus Fern Meyerii
-0
Asparagus Fern Seeds - Meyerii
Starting at $5.39
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
Mimulus Seeds - Magic Ball Mixmid size pouch type seed packaging for - Mimulus Magic Ball Mix
-0
Mimulus Seeds - Magic Ball Mix
Starting at $4.39
Bean Seeds - Bush - Tamba Kuro Otsubu Soybeanmid size pouch type seed packaging for - Bean Bush Tamba Kuro Otsubu Soybean
-0
Bean Seeds - Bush - Tamba Kuro Otsubu Soybean
Starting at $3.99
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
Onion Seeds - Short - Texas Grano 502
-0
Heirloom
Onion Seeds - Short - Texas Grano 502
Starting at $2.99
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
Peony Bulbs - Red CharmPeony Bulbs - Red Charm
-0
Peony Bulbs - Red Charm
Starting at $22.99
Allium Bulbs - Mount Everest
-0
Allium Bulbs - Mount Everest
Starting at $22.90
Peony Bulbs - Sarah BernhardtPeony Bulbs - Sarah Bernhardt
-0
Peony Bulbs - Sarah Bernhardt
Starting at $17.99
Iberis (Candytuft) Seeds - Whiteout
Starting at $5.39
Asparagus Crowns - Millenium
Starting at $9.48
Rhubarb Crowns - Crimson Red
Starting at $13.98
Grape Roots - Seedless - Concord
$10.50 $20.99
Raspberry Roots - Fall Gold
$18.99
Blackberry Roots - Chester
$21.99
Blueberry Roots - Earliblue
$19.99
Raspberry Roots - Heritage
$18.99
Elderberry Roots
$19.99
Grape Roots - Seedless - Himrod
$10.50 $20.99
Boysenberry Roots
$18.99
Blueberry Roots - Northland
$19.99
Hops Roots - Nugget
$19.49
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