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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
4042 Items
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Pak Choi Seeds - Extra Dwarfmid size pouch type seed packaging for - Pak Choi Extra Dwarf
-0
Heirloom
Pak Choi Seeds - Extra Dwarf
Starting at $3.99
Soft White Wheat (Organic) - Bulk GrainsSoft White Wheat (Organic) - Bulk Grains
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Organic
Soft White Wheat (Organic) - Bulk Grains
Starting at $8.84
Squash Seeds - Winter - Blue Hubbardmid size pouch type seed packaging for - Squash Winter Blue Hubbard
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Heirloom
Squash Seeds - Winter - Blue Hubbard
Starting at $2.99
Milk Thistle Seedssmall size packet type seed packaging for - Milk Thistle
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Milk Thistle Seeds
Starting at $2.99
Lavender Seeds - Hidcote Blue
-0
Lavender Seeds - Hidcote Blue
Starting at $6.88
Corn Seeds - Sweet - Honey Select F1 Hybridmid size pouch type seed packaging for - Corn Sweet Honey Select Hybrid
-0
AAS Winner
Corn Seeds - Sweet - Honey Select F1 Hybrid
Starting at $4.59
Cucumber Seeds - Marketmore 76mid size pouch type seed packaging for - Cucumber Marketmore 76
-31%
Heirloom
Cucumber Seeds - Marketmore 76
Starting at $1.99
Hard White Wheat Organic
Hard White Wheat (Organic) - Bulk Grains
-0
Organic
Hard White Wheat (Organic) - Bulk Grains
Starting at $7.84
pH Test StripspH Test Strips
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pH Test Strips
$2.90
Mustard - Mizuna Red Leaf - Microgreens SeedsMustard - Mizuna Red Leaf - Microgreens Seeds
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Heirloom
Mustard - Mizuna Red Leaf - Microgreens Seeds
Starting at $8.32
Cauliflower Seeds - Self-Blanchesmall size packet type seed packaging for - Cauliflower Self-Blanche
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Heirloom
Cauliflower Seeds - Self-Blanche
Starting at $2.99
Plantain Seeds - Bostonsmall size packet type seed packaging for - Plantain Boston
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Plantain Seeds - Boston
Starting at $2.99
Zinnia Seeds - Thumbelina Mixturemid size pouch type seed packaging for - Zinnia Thumbelina Mixture
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AAS Winner
Zinnia Seeds - Thumbelina Mixture
Starting at $2.99
Eggplant Seeds - Long Purplemid size pouch type seed packaging for - Eggplant Long Purple
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Heirloom
Eggplant Seeds - Long Purple
Starting at $2.99
Mustard - Spinach (Komatsuna) - Microgreens SeedsMustard - Spinach (Komatsuna) - Microgreens Seeds
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Heirloom
Mustard - Spinach (Komatsuna) - Microgreens Seeds
Starting at $7.74
""
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Squash Seeds - Winter - Table King Bush Acorn
Starting at $2.99
Squash Seeds - Winter - Japanese Red Kuri (Uchiki Kuri)Squash Seeds - Winter - Japanese Red Kuri (Uchiki Kuri)
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Squash Seeds - Winter - Japanese Red Kuri (Uchiki Kuri)
Starting at $3.99
Lettuce - Microgreens SeedsLettuce - Microgreens Seeds
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Lettuce - Microgreens Seeds
Starting at $5.80
Crimson Clover - Organic - Sprouting SeedsCrimson Clover - Organic - Sprouting Seeds
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Organic
Crimson Clover - Organic - Sprouting Seeds
Starting at $5.53
Pepper Seeds - Hot - Fresno Chilismall size packet type seed packaging for - Pepper Hot Fresno Chili
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Pepper Seeds - Hot - Fresno Chili
Starting at $2.99
Eggplant Seeds - Fairy Tale Hybridmid size pouch type seed packaging for - Eggplant Fairy Tale Hybrid
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Eggplant Seeds - Fairy Tale Hybrid
Starting at $4.09
Garlic Bulbs - Fall - Hardneck - DuganskiGarlic Bulbs - Fall - Hardneck - Duganski
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$17.99
Tray Insert - 32 Cell - 8x4 NestedTray Insert - 32 Cell - 8x4 Nested
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Tray Insert - 32 Cell - 8x4 Nested
Starting at $13.63
Lettuce Seeds - Leaf - Lollo Rossomid size pouch type seed packaging for - Lettuce Leaf Lollo Rosso
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Lettuce Seeds - Leaf - Lollo Rosso
Starting at $2.99
Fenugreek (Organic) - Microgreens SeedsFenugreek (Organic) - Microgreens Seeds
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Organic
Fenugreek (Organic) - Microgreens Seeds
Starting at $7.47
Coleus Seeds - Rainbow Mixturemid size pouch type seed packaging for - Coleus Rainbow Mixture
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Starting at $2.99
Spinach Seeds - New Zealandmid size pouch type seed packaging for - Spinach New Zealand
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Spinach Seeds - New Zealand
Starting at $3.09
Artichoke Seeds - Purple Italian Globemid size pouch type seed packaging for - Artichoke Purple Italian Globe
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Artichoke Seeds - Purple Italian Globe
Starting at $4.75
Bean Seeds - Bush - Midori Giant Edamame Soybean
Starting at $3.99
Zinnia Seeds - State Fair Mix
Starting at $3.39
Organic Heirloom Variety - 16 Pack
$35.48
Cucumber Seeds - Armenian Striped
Starting at $2.99
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