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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
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Melon Seeds - Cantaloupe - Hales Best Jumbosmall size packet type seed packaging for - Melon Cantaloupe Hales Best Jumbo
-0
Heirloom
Melon Seeds - Cantaloupe - Hales Best Jumbo
Starting at $3.09
Petunia Seeds - Supercascade Series (pelleted)Petunia Seeds - Supercascade Series (pelleted)
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Petunia Seeds - Supercascade Series (pelleted)
Starting at $2.99
Melon Seeds - Cantaloupe - Hales Best Jumbo (Organic)small size packet type seed packaging for - Melon Cantaloupe Hales Best Jumbo Organic
-0
Heirloom
Organic
Melon Seeds - Cantaloupe - Hales Best Jumbo (Organic)
Starting at $3.59
Petunia Seeds - Easy Wave Series (pelleted)Petunia Seeds - Easy Wave Series (pelleted)
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Petunia Seeds - Easy Wave Series (pelleted)
Starting at $3.69
Pumpkin Seeds - Jack O LanternPumpkin Seeds - Jack O Lantern
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Heirloom
Pumpkin Seeds - Jack O Lantern
Starting at $3.29
Petunia Seeds - Dreams Series (pelleted)Petunia Seeds - Dreams Series (pelleted)
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Petunia Seeds - Dreams Series (pelleted)
Starting at $2.99
Gourds Seeds - Luffa Sponge
-0
Heirloom
Gourds Seeds - Luffa Sponge
Starting at $3.99
Petunia Seeds - Madness Series (pelleted)Petunia Seeds - Madness Series (pelleted)
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Petunia Seeds - Madness Series (pelleted)
Starting at $3.09
Petunia Seeds - Daddy Series (Pelleted)Petunia Seeds - Daddy Series (Pelleted)
-0
Petunia Seeds - Daddy Series (Pelleted)
Starting at $3.09
Pumpkin Seeds - Connecticut FieldPumpkin Seeds - Connecticut Field
-0
Heirloom
Pumpkin Seeds - Connecticut Field
Starting at $2.99
Petunia Seeds - Double Cascade Series (Pelleted)Petunia Seeds - Double Cascade Series (Pelleted)
-2%
Petunia Seeds - Double Cascade Series (Pelleted)
Starting at $3.29
Gourds Seeds - Birdhousemid size pouch type seed packaging for - Gourds Birdhouse
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Heirloom
Gourds Seeds - Birdhouse
Starting at $2.99
Pumpkin Seeds - Cinderella (Organic)small size packet type seed packaging for - Pumpkin Cinderella Organic
-0
Heirloom
Organic
Pumpkin Seeds - Cinderella (Organic)
Starting at $3.59
Pepper Seeds - Hot - Habanero Caribbean Redmid size pouch type seed packaging for - Pepper Hot Habanero Caribbean Red
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Heirloom
Pepper Seeds - Hot - Habanero Caribbean Red
Starting at $3.39
Petunia Seeds - Double Madness Series (pelleted)Petunia Seeds - Double Madness Series (pelleted)
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Petunia Seeds - Double Madness Series (pelleted)
Starting at $3.69
Begonia Seeds - Fibrous - Cocktail Series (Pelleted)Begonia Seeds - Fibrous - Cocktail Series (Pelleted)
-0
Begonia Seeds - Fibrous - Cocktail Series (Pelleted)
Starting at $2.99
Melon Seeds - Canary Yellowmid size pouch type seed packaging for - Melon Canary Yellow
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Heirloom
Melon Seeds - Canary Yellow
Starting at $2.99
Pumpkin Seeds - Cinderellamid size pouch type seed packaging for - Pumpkin Cinderella
-47%
Heirloom
Pumpkin Seeds - Cinderella
Starting at $1.99
Petunia Seeds - Wave Series (pelleted)Petunia Seeds - Wave Series (pelleted)
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AAS Winner
Staff Favorite
Petunia Seeds - Wave Series (pelleted)
Starting at $3.69
Melon Seeds - Crenshaw - CrenshawMelon Seeds - Crenshaw - Crenshaw
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Heirloom
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Starting at $2.99
Petunia Seeds - Hulahoop Series (pelleted)Petunia Seeds - Hulahoop Series (pelleted)
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Petunia Seeds - Hulahoop Series (pelleted)
Starting at $3.09
Artichoke Seeds - Imperial Starmid size pouch type seed packaging for - Artichoke Imperial Star
-37%
Artichoke Seeds - Imperial Star
Starting at $3.52
Pumpkin Seeds - Jack O Lantern - Organicsmall size packet type seed packaging for - Pumpkin Jack O Lantern Organic
-0
Heirloom
Organic
Pumpkin Seeds - Jack O Lantern - Organic
Starting at $3.59
Petunia Seeds - Prism Sunshine (pelleted)Petunia Seeds - Prism Sunshine (pelleted)
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Petunia Seeds - Prism Sunshine (pelleted)
Starting at $2.99
Petunia Seeds - Tidal Wave Series (pelleted)Petunia Seeds - Tidal Wave Series (pelleted)
-0%
AAS Winner
Petunia Seeds - Tidal Wave Series (pelleted)
Starting at $3.69
Pumpkin Seeds - Caspersmall size packet type seed packaging for - Pumpkin Casper
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Heirloom
Pumpkin Seeds - Casper
Starting at $2.99
Moonflower Seeds - Tall Night Floweringsmall size packet type seed packaging for - Moonflower Tall Night Flowering
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Moonflower Seeds - Tall Night Flowering
Starting at $3.09
Morning Glory Seeds - Heavenly Bluemid size pouch type seed packaging for - Morning Glory Heavenly Blue
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Morning Glory Seeds - Heavenly Blue
Starting at $2.99
Pumpkin Seeds - White Queensmall size packet type seed packaging for - Pumpkin White Queen
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Pumpkin Seeds - White Queen
Starting at $3.79
Petunia Seeds - Picobella Series (pelleted)Petunia Seeds - Picobella Series (pelleted)
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Petunia Seeds - Picobella Series (pelleted)
Starting at $3.59
Pumpkin Seeds - Howden
Starting at $3.59
Morning Glory Seeds - Mixed Colors
Starting at $2.99
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