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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4009 Items
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Onion Seeds - Bunching - Tokyo Long WhiteOnion Seeds - Bunching - Tokyo Long White
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Onion Seeds - Bunching - Tokyo Long White
Starting at $3.99
Cilantro Seeds - Slow Boltmid size pouch type seed packaging for - Cilantro Slow Bolt
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Radish - Daikon Minowase (Organic) - Sprouting SeedsRadish - Daikon Minowase (Organic) - Sprouting Seeds
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Starting at $2.99
Asparagus Seeds - Mary Washingtonmid size pouch type seed packaging for - Asparagus Mary Washington
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Corn Seeds - Sweet - Golden Bantam 12mid size pouch type seed packaging for - Corn Sweet Golden Bantam 12
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Pepper Seeds - Sweet - Cal WonderPepper Seeds - Sweet - Cal Wonder
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Starting at $2.99
Swiss Chard - Ruby Red - Microgreens SeedsSwiss Chard - Ruby Red - Microgreens Seeds
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Lettuce Seeds - Romaine - Parris Island CosLettuce Seeds - Romaine - Parris Island Cos
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10 x10 Growing Trays WITH Drain Holes10 x10 Growing Trays WITH Drain Holes
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Carrot Seeds - Rainbow Blendsmall size packet type seed packaging for - Carrot Rainbow Blend
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Basil Seeds - Italian Large Leaf (Organic)small size packet type seed packaging for - Basil Italian Large Leaf Organic
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Starting at $3.59
3 Part Salad Mix (Organic) - Sprouting Seeds3 Part Salad Mix (Organic) - Sprouting Seeds
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Green Pea - Organic - Sprouting SeedsGreen Pea - Organic - Sprouting Seeds
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Kohlrabi - Purple Vienna - Microgreens SeedsKohlrabi - Purple Vienna - Microgreens Seeds
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Leek - Large American Flag - Microgreens SeedsLeek - Large American Flag - Microgreens Seeds
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Starting at $8.30
Squash Seeds - Summer - Early Prolific StraightneckSquash Seeds - Summer - Early Prolific Straightneck
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Starting at $2.99
Corn Seeds - Sweet - Peaches and Cream Hybridmid size pouch type seed packaging for - Corn Sweet Peaches and Cream Hybrid
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Lemongrass Seeds - West IndianLemongrass Seeds - West Indian
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Starting at $3.89
Turnip Seeds - Purple Top White GlobeTurnip Seeds - Purple Top White Globe
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Arugula Seeds - Slow Bolt (Organic)mid size pouch type seed packaging for - Arugula Slow Bolt Organic
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Starting at $3.59
Celery Seeds - Utah 52-70mid size pouch type seed packaging for - Celery Utah 52-70
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Starting at $2.99
Watermelon Seeds - Picnic - Crimson SweetWatermelon Seeds - Picnic - Crimson Sweet
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Starting at $2.99
Cauliflower Seeds - Snowball Y Improvedmid size pouch type seed packaging for - Cauliflower Snowball Y Improved
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Starting at $2.99
Carrot - Microgreens Seedsmid size pouch type seed packaging for - Carrot Microgreens
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Starting at $6.92
Lettuce Seeds - Butterhead - Buttercrunch (Organic)small size packet type seed packaging for - Lettuce Butterhead Buttercrunch Organic
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Starting at $3.89
Beet Seeds - Detroit Dark Red (Organic)Beet Seeds - Detroit Dark Red (Organic)
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Starting at $3.59
Watermelon Seeds - Picnic - Crimson Sweet (Organic)small size packet type seed packaging for - Watermelon Picnic Crimson Sweet Organic
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Starting at $1.99
Geranium Seeds - Maverick SeriesGeranium Maverick Series Star pink w rose eye
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Starting at $4.69
Onion Seeds - Bunching - Evergreen White Nebuka (Organic)Onion Seeds - Bunching - Evergreen White Nebuka (Organic)
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Starting at $3.99
Oregano Seeds - Common Italian
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Starting at $2.79
Sunflower - Black Oil (Organic) - Sprouting SeedsSunflower - Black Oil (Organic) - Sprouting Seeds
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Starting at $3.59
Leek Seeds - Large American FlagLeek Seeds - Large American Flag
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