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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3004 Items
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Pea - Austrian Field Pea - Cover Crop Seedsmid size pouch type seed packaging for - Pea Austrian Field Pea Cover Crop
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Pea - Austrian Field Pea - Cover Crop Seeds
Starting at $9.21
Swiss Chard Seeds - Ruby Red - Organicsmall size packet type seed packaging for - Swiss Chard Ruby Red Organic
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Pea Seeds - Snow - Oregon Giantmid size pouch type seed packaging for - Pea Snow Oregon Giant
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Pea Seeds - Snow - Oregon Giant
Starting at $3.29
Lettuce Seeds - Romaine - Cimmaronmid size pouch type seed packaging for - Lettuce Romaine Cimmaron
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Starting at $2.99
Heirloom Hot and Sweet Pepper Collection - 8 PackHeirloom Hot and Sweet Pepper Collection - 8 Pack
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Heirloom Hot and Sweet Pepper Collection - 8 Pack
$13.94
Alyssum Seeds - Wonderland SeriesAlyssum Seeds - Wonderland Series
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Alyssum Seeds - Wonderland Series
Starting at $3.89
African Marigold Seeds - Inca II SeriesAfrican Marigold Seeds - Inca II Series
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Staff Favorite
African Marigold Seeds - Inca II Series
Starting at $4.79
Tomato Seeds - Slicing - German Johnsonmid size pouch type seed packaging for - Tomato Slicing German Johnson
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Petunia Seeds - Hulahoop Series (pelleted)Petunia Seeds - Hulahoop Series (pelleted)
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Petunia Seeds - Hulahoop Series (pelleted)
Starting at $3.09
Beet Seed - Bulls Bloodsmall size packet type seed packaging for - Beet Bulls Blood
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Squash Seeds - Summer - Zucchini GreySquash Seeds - Summer - Zucchini Grey
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Squash Seeds - Summer - Zucchini Grey
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Okra Seeds - Perkins Long Podsmall size packet type seed packaging for - Okra Perkins Long Pod
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Okra Seeds - Perkins Long Pod
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Verbena Seeds - Quartz XP SeriesVerbena Seeds - Quartz XP Series
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Verbena Seeds - Quartz XP Series
Starting at $4.69
Arugula Seeds - Rocket (Roquette)
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Pepper Seeds - Sweet - Gatherers Gold Sweet Italian (Organic)small size packet type seed packaging for - Pepper Sweet Gatherers Gold Sweet Italian Organic
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Organic
Pepper Seeds - Sweet - Gatherers Gold Sweet Italian (Organic)
Starting at $5.99
Summer Savory SeedsSummer Savory Seeds
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Summer Savory Seeds
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Malabar Spinach Seeds - Big Round Leaf
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Malabar Spinach Seeds - Big Round Leaf
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Lettuce Seeds - Butterhead - Bronze Mignonettesmall size packet type seed packaging for - Lettuce Butterhead Bronze Mignonette
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Clover Trio Cover Crop Seed MixClover Trio Cover Crop Seed Mix
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Starting at $6.39
Spinach Seeds - ViroflaySpinach Seeds - Viroflay
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Spinach Seeds - Viroflay
Starting at $2.97
Bean Seeds - Pole - You Fong Wong Yard Longmid size pouch type seed packaging for - Bean Pole You Fong Wong Yard Long
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Watermelon Seeds - Mini - Baby Doll Hybridmid size pouch type seed packaging for - Watermelon Mini Baby Doll Hybrid
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Starting at $5.89
Collards Seeds - Vatesmid size pouch type seed packaging for - Collards Vates
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Snapdragon Seeds - Floral Showers SeriesSnapdragon Seeds - Floral Showers Series
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Snapdragon Seeds - Floral Showers Series
Starting at $2.99
Tomato Seeds - Slicing - Pineapplemid size pouch type seed packaging for - Zinnia Magellan Series Orange
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Tomato Seeds - Slicing - Pineapple
Starting at $3.79
Lettuce Seeds - Little Gem - Organicmid size pouch type seed packaging for - Lettuce Little Gem Organic
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Organic
Lettuce Seeds - Little Gem - Organic
Starting at $1.99
Bean Seeds - Bush - Pinto (Organic)Bean Seeds - Bush - Pinto (Organic)
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Bean Seeds - Bush - Pinto (Organic)
Starting at $3.59
Beet Seeds - Cylindramid size pouch type seed packaging for - Beet Cylindra
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Rhubarb Seeds - VictoriaRhubarb Seeds - Victoria
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Cauliflower Seeds - Snowball Y Improved - Organic
Starting at $3.59
Pepper Seeds - Hot - Poblano Ancho
Starting at $2.99
Cucumber Seeds - Tsuyataro - Hybrid
Starting at $3.99
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