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
430 Items
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Wildflower Seeds - Shaded Woodland Partial Shade MixWildflower Seeds - Shaded Woodland Partial Shade Mix
-9%
Staff Favorite
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$12.88 $14.23
Endive Seeds - Witloof Chicorysmall size packet type seed packaging for - Endive Witloof Chicory
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Starting at $2.99
Angelica Seedsmid size pouch type seed packaging for - Angelica
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Angelica Seeds
Starting at $2.99
Alyssum Seeds - Easter Bonnet Series (Raw or MSP)Alyssum Seeds - Easter Bonnet Series (Raw or MSP)
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Starting at $4.14
Hypoestes Seeds - Splash Select SeriesHypoestes Seeds - Splash Select Series
-0
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Starting at $3.39
Radish Seeds - Chinese - Starburst - Hybridmid size pouch type seed packaging for - Radish Chinese Starburst Hybrid
-0
Radish Seeds - Chinese - Starburst - Hybrid
Starting at $3.99
Chinese Cabbage Seeds - Chun Yeon Gold - Hybridmid size pouch type seed packaging for - Chinese Cabbage Chun Yeon Gold Hybrid
-50%
Chinese Cabbage Seeds - Chun Yeon Gold - Hybrid
Starting at $1.99
Gourds Seeds - Large & Small Mixmid size pouch type seed packaging for - Gourds Large & Small Mix
-0
Heirloom
Gourds Seeds - Large & Small Mix
Starting at $2.99
Chia - White (Organic) - Sprouting SeedsChia - White (Organic) - Sprouting Seeds
-0
Heirloom
Organic
Chia - White (Organic) - Sprouting Seeds
Starting at $3.59
Chrysanthemum Seeds - Broad Leaf, Edible - MicrogreensChrysanthemum Seeds - Broad Leaf, Edible - Microgreens
-8%
Heirloom
Chrysanthemum Seeds - Broad Leaf, Edible - Microgreens
Starting at $4.99
Turnip Seeds - Gold Ballsmall size packet type seed packaging for - Turnip Gold Ball
-33%
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Turnip Seeds - Gold Ball
Starting at $1.99
Salvia Seeds - Sizzler SeriesSalvia Seeds - Sizzler Series
-0
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Starting at $4.69
Fennel Seeds - Sweetsmall size packet type seed packaging for - Fennel Sweet
-0
Heirloom
Fennel Seeds - Sweet
Starting at $2.99
Cosmos Seeds - Sea ShellsCosmos Seeds - Sea Shells
-0
Cosmos Seeds - Sea Shells
Starting at $2.99
Flower Seeds - Babys Breathsmall size packet type seed packaging for - Flower Babys Breath
-0
Heirloom
Flower Seeds - Babys Breath
Starting at $2.99
Pampas Grass SeedsPampas Grass Seeds
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Pampas Grass Seeds
Starting at $2.99
Leek Seeds - Giant MusselburghLeek Seeds - Giant Musselburgh
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Leek Seeds - Giant Musselburgh
Starting at $2.99
Dianthus Seeds - Floral Lace Series (Pelleted)Dianthus Seeds - Floral Lace Series (Pelleted)
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Starting at $4.89
Pepper Seeds - Sweet - White Cloudmid size pouch type seed packaging for - Pepper Sweet White Cloud
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Pepper Seeds - Sweet - White Cloud
Starting at $2.99
Radish Seeds - Shirahime Hatsuka Daikonmid size pouch type seed packaging for - Radish Shirahime Hatsuka Daikon
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Radish Seeds - Shirahime Hatsuka Daikon
Starting at $3.99
Eggplant Seeds - White Eggmid size pouch type seed packaging for - Zinnia Magellan Series Orange
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Starting at $1.99
Osteospermum Seeds - Asti SeriesOsteospermum Seeds - Asti Series
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Starting at $6.79
Cauliflower Seeds - All Year Roundmid size pouch type seed packaging for - Cauliflower All Year Round
-0
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Cauliflower Seeds - All Year Round
Starting at $3.29
Petunia Seeds - Pirouette Rose (pelleted)mid size pouch type seed packaging for - Petunia Pirouette Rose pelleted
-0
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Petunia Seeds - Pirouette Rose (pelleted)
Starting at $3.29
Eggplant Seeds - Casper Whitesmall size packet type seed packaging for - Eggplant Casper White
-0
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Starting at $4.29
Chinese Cabbage Seeds - Kyoto No. 3mid size pouch type seed packaging for - Chinese Cabbage Kyoto No 3
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Starting at $3.99
Carrot Seeds - Lunar Whitemid size pouch type seed packaging for - Carrot Lunar White
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Starting at $1.99
Kale Seeds - White Russian - Microgreens
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Fennel Seeds - Bronze
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Pollinator Flower Seeds - Butterfly Feed Mix
Starting at $3.69
Seed Potatoes - Spring - Red Pontiac (Organic)
Starting at $19.33
Zinnia Seeds - Peppermint Stick
Starting at $3.69
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