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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355 Items
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Bean Seeds - Pole - Purple French Filetmid size pouch type seed packaging for - Zinnia Magellan Series Orange
-0
Heirloom
Bean Seeds - Pole - Purple French Filet
Starting at $4.92
Ornamental Millet Seeds - Purple Majestymid size pouch type seed packaging for - Ornamental Millet Purple Majesty
-0
AAS Winner
Ornamental Millet Seeds - Purple Majesty
Starting at $9.58
Pepper Seeds - Hot - NuMex Twilightmid size pouch type seed packaging for - Pepper Hot NuMex Twilight
-0
Heirloom
Pepper Seeds - Hot - NuMex Twilight
Starting at $3.29
Liatris Z Scape
-0
Liatris Seeds - Z-Scape
Starting at $3.39
Bean Seeds - Bush - Royal Burgundy (Treated)mid size pouch type seed packaging for - Bean Bush Royal Burgundy Treated
-0
Heirloom
Bean Seeds - Bush - Royal Burgundy (Treated)
Starting at $11.49
Basil Seeds - Corsican
-0
Heirloom
Basil Seeds - Corsican
Starting at $2.49
Cosmos Seeds - Sensation Mix (Organic) - Clearance Seeds
-41%
Organic
Cosmos Seeds - Sensation Mix (Organic) - Clearance Seeds
Starting at $4.20
Culinary Basil Collection 5 Seeds & Book Basil Seeds Collection - 5 Varieties
-0
Heirloom
Basil Seeds Collection - 5 Varieties
$15.80
Pak Choi Seeds - Purple Gem Hybridmid size pouch type seed packaging for - Pak Choi Purple Gem Hybrid
-50%
Pak Choi Seeds - Purple Gem Hybrid
Starting at $1.99
Cauliflower Seeds - Purple of Sicilymid size pouch type seed packaging for - Zinnia Magellan Series Orange
-0
Heirloom
Cauliflower Seeds - Purple of Sicily
Starting at $3.89
Pak Choi Seeds - Purple Magic Epic High - Hybridmid size pouch type seed packaging for - Pak Choi Purple Magic Epic High Hybrid
-50%
Pak Choi Seeds - Purple Magic Epic High - Hybrid
Starting at $1.99
Pak Choi Seeds - Da Hong Summer Hybridmid size pouch type seed packaging for - Pak Choi Da Hong Summer Hybrid
-50%
Pak Choi Seeds - Da Hong Summer Hybrid
Starting at $1.99
Echinacea Seeds - Purpurea (Organic)mid size pouch type seed packaging for - Echinacea Purpurea Organic
-0
Heirloom
Organic
Echinacea Seeds - Purpurea (Organic)
Starting at $3.99
Mustard Seeds - Red Komatsuna Hybridmid size pouch type seed packaging for - Mustard Red Komatsuna Hybrid
-0
Mustard Seeds - Red Komatsuna Hybrid
Starting at $3.99
Nierembergia Seeds - Robe SeriesNierembergia Seeds - Robe Series
-0
AAS Winner
Nierembergia Seeds - Robe Series
Starting at $3.69
Eggplant Seeds - Morden Midget (organic)
-0
Heirloom
Organic
Eggplant Seeds - Morden Midget (organic)
Starting at $4.89
Heuchera Seeds - Purple Palace (Pelleted)mid size pouch type seed packaging for - Heuchera Purple Palace Pelleted
-0
Heuchera Seeds - Purple Palace (Pelleted)
Starting at $2.99
Pea Seeds - Blue Shelling (Organic)small size packet type seed packaging for - Pea Blue Shelling Organic
-0
Heirloom
Organic
Pea Seeds - Blue Shelling (Organic)
Starting at $3.59
Smart Seal Lids - Multi-Color 10 PackSmart Seal Lids - Multi-Color 10 Pack
-0
Smart Seal Lids - Multi-Color 10 Pack
$104.99
Bean Seeds - Bush - Jackson Wonder Limamid size pouch type seed packaging for - Zinnia Magellan Series Orange
-0
Heirloom
Bean Seeds - Bush - Jackson Wonder Lima
Starting at $4.33
Mustard Seeds - Japanese Giant Garnet
-50%
Mustard Seeds - Japanese Giant Garnet
Starting at $1.99
Iberis Candytuft Dwarf Fairy MixtureIberis Candytuft Dwarf Fairy Mixture
-0
Iberis (Candytuft) Seeds - Dwarf Fairy Mixture
Starting at $2.99
Salpiglossis Seeds - Royale SeriesSalpiglossis Seeds - Royale Series
-0
Salpiglossis Seeds - Royale Series
Starting at $4.79
Cauliflower Seeds - Violetta Italiamid size pouch type seed packaging for - Cauliflower Violetta Italia
-0
Heirloom
Cauliflower Seeds - Violetta Italia
Starting at $3.29
Basil Seeds - Culinary Blend (Organic)small size packet type seed packaging for - Basil Culinary Blend Organic
-0
Heirloom
Organic
Basil Seeds - Culinary Blend (Organic)
Starting at $3.59
Lettuce Leaf - Ruby Red - Microgreens SeedsLettuce Leaf - Ruby Red - Microgreens Seeds
-0
Heirloom
Lettuce Leaf - Ruby Red - Microgreens Seeds
Starting at $10.34
Shiso Herb (Perilla) - Korean - Microgreens Seeds
-0
Heirloom
Shiso Herb (Perilla) - Korean - Microgreens Seeds
Starting at $14.34
Zinnia Seeds - Cactus Flowered Mix
Starting at $3.39
Delosperma - Ice Plant (Pelleted)
Starting at $2.99
Pepper Seeds - Ornamental - Autumn Time
Starting at $3.09
Asparagus Seeds - Sweet Purple
Starting at $4.89
Dianthus Seeds - Cottage Pinks
Starting at $2.99
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