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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
28 Items
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Leek Seeds - Large American FlagLeek Seeds - Large American Flag
-0
Heirloom
Leek Seeds - Large American Flag
Starting at $2.99
Lavender Seeds - Common English (aka Vera)Lavender Seeds - Common English (aka Vera)
-0
Staff Favorite
Lavender Seeds - Common English (aka Vera)
Starting at $2.99
Begonia Seeds - Tuberous - Nonstop Series (Pelleted)Begonia Seeds - Tuberous - Nonstop Series (Pelleted)
-0
Staff Favorite
Begonia Seeds - Tuberous - Nonstop Series (Pelleted)
Starting at $4.69
Gourds Seeds - Luffa Sponge
-0
Heirloom
Gourds Seeds - Luffa Sponge
Starting at $3.99
Gourds Seeds - Birdhousemid size pouch type seed packaging for - Gourds Birdhouse
-0
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
Pumpkin Seeds - Cinderellamid size pouch type seed packaging for - Pumpkin Cinderella
-47%
Heirloom
Pumpkin Seeds - Cinderella
Starting at $1.99
Artichoke Seeds - Imperial Starmid size pouch type seed packaging for - Artichoke Imperial Star
-37%
Artichoke Seeds - Imperial Star
Starting at $3.52
Lavender Seeds - Munstead
-4%
Heirloom
Lavender Seeds - Munstead
Starting at $3.99
Rosemary Seeds (Organic)mid size pouch type seed packaging for - Tomato Slicing Yellow Perfection Organic
-0
Heirloom
Organic
Rosemary Seeds (Organic)
Starting at $4.29
Pumpkin Seeds - Show Winnermid size pouch type seed packaging for - Pumpkin Show Winner
-0
Heirloom
Pumpkin Seeds - Show Winner
Starting at $2.99
Leek Seeds - Giant MusselburghLeek Seeds - Giant Musselburgh
-0
Heirloom
Leek Seeds - Giant Musselburgh
Starting at $2.99
Cotton Seeds - Erlenes GreenCotton Seeds - Erlenes Green
-0
Heirloom
Cotton Seeds - Erlenes Green
Starting at $2.99
Gourds Seeds - Dipper Long Handlemid size pouch type seed packaging for - Gourds Dipper Long Handle
-0
Heirloom
Gourds Seeds - Dipper Long Handle
Starting at $3.29
Cotton Seeds - Sea Island BrownCotton Seeds - Sea Island Brown
-0
Heirloom
Cotton Seeds - Sea Island Brown
Starting at $3.39
Amaranth Seeds - All Red Leafmid size pouch type seed packaging for - Amaranth All Red Leaf
-0
Amaranth Seeds - All Red Leaf
Starting at $2.99
Cotton Seeds - Arkansas Green LintCotton Seeds - Arkansas Green Lint
-0
Heirloom
Cotton Seeds - Arkansas Green Lint
Starting at $3.39
Cotton Seeds - Mississippi BrownCotton Seeds - Mississippi Brown
-0
Heirloom
Cotton Seeds - Mississippi Brown
Starting at $3.39
Mimulus Seeds - Magic Ball Mixmid size pouch type seed packaging for - Mimulus Magic Ball Mix
-0
Mimulus Seeds - Magic Ball Mix
Starting at $4.39
Cotton Seeds - NankeenCotton Seeds - Nankeen
-0
Heirloom
Cotton Seeds - Nankeen
Starting at $3.39
Onion Seeds - Short - Texas Grano 502
-0
Heirloom
Onion Seeds - Short - Texas Grano 502
Starting at $2.99
Gourd Seeds - Caveman Club - Organicsmall size packet type seed packaging for - Gourd Caveman Club Organic
-0
Heirloom
Organic
Gourd Seeds - Caveman Club - Organic
Starting at $3.79
Lavender Seeds (Organic)
Starting at $3.59
Parsnip Seeds - Harris Model
Starting at $2.99
Competition Pumpkin Seeds - 400 lb plus
$9.97
Cotton Seeds - Red Beauty
Starting at $3.39
Gourd Seeds - Bushel
Starting at $2.99
Rudbeckia Seeds - Gloriosa Double
Starting at $3.59
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