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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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
Crimson Clover - Organic - Microgreens SeedsCrimson Clover - Organic - Microgreens Seeds
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Crimson Clover - Organic - Microgreens Seeds
Starting at $5.53
Wheat - Hard White (Organic) - Sprouting SeedsWheat - Hard White (Organic) - Sprouting Seeds
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Heirloom
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Wheat - Hard White (Organic) - Sprouting Seeds
Starting at $7.84
Watermelon Seeds - Picnic - Moon & Stars (Organic)mid size pouch type seed packaging for - Watermelon Picnic Moon & Stars Organic
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Organic
Watermelon Seeds - Picnic - Moon & Stars (Organic)
Starting at $3.59
Oat Groats (Organic) - Bulk Grains
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Organic
Oat Groats (Organic) - Bulk Grains
Starting at $8.80
Gourds Seeds - Large Mixmid size pouch type seed packaging for - Gourds Large Mix
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Heirloom
Gourds Seeds - Large Mix
Starting at $3.29
"Hibiscus Seeds - Luna Series
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Hibiscus Seeds - Luna Series
Starting at $15.36
Tomato Seeds - Paste - Rio Grandemid size pouch type seed packaging for - Tomato Paste Rio Grande
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Heirloom
Tomato Seeds - Paste - Rio Grande
Starting at $2.99
Eggplant Seeds - Long Ping TungEggplant Seeds - Long Ping Tung
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Eggplant Seeds - Long Ping Tung
Starting at $3.99
Bean Seeds - Bush - Black Turtle (Organic)Bean Seeds - Bush - Black Turtle (Organic)
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Bean Seeds - Bush - Black Turtle (Organic)
Starting at $8.90
Sunflower Seeds - Italian White
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Sunflower Seeds - Italian White
Starting at $2.99
Basil Seeds - Red Rubinsmall size packet type seed packaging for - Basil Red Rubin
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Basil Seeds - Red Rubin
Starting at $3.09
Radish - Red Volcano (Organic) - Sprouting SeedsRadish - Red Volcano (Organic) - Sprouting Seeds
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Organic
Radish - Red Volcano (Organic) - Sprouting Seeds
Starting at $3.59
Calendula Seeds - Bon Bon SeriesCalendula Seeds - Bon Bon Series
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Starting at $3.09
Watermelon Seeds - Icebox - Bush Sugar Babysmall size packet type seed packaging for - Watermelon Icebox Bush Sugar Baby
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Watermelon Seeds - Icebox - Bush Sugar Baby
Starting at $2.99
Radish Seeds - Korean - Cheong Du - Hybrid
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Starting at $3.99
Gift Card
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Starting at $10.00
Petunia Seeds - Prism Sunshine (pelleted)Petunia Seeds - Prism Sunshine (pelleted)
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AAS Winner
Petunia Seeds - Prism Sunshine (pelleted)
Starting at $2.99
Celery Microgreens SeedsCelery Microgreens Seeds
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Celery Microgreens Seeds
Starting at $6.21
Brown Flax (Organic) - Bulk GrainsBrown Flax (Organic) - Bulk Grains
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Organic
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Starting at $8.73
Pepper Seeds - Sweet - Sunbrightmid size pouch type seed packaging for - Pepper Sweet Sunbright
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Heirloom
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Starting at $2.99
Tomato Seeds - Cherry - Juliet HybridTomato Seeds - Cherry - Juliet Hybrid
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Starting at $4.19
Fenugreek Seedssmall size packet type seed packaging for - Fenugreek
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Fenugreek Seeds
Starting at $2.99
Pumpkin Seeds - Small Sugar - Organicsmall size packet type seed packaging for - Pumpkin Small Sugar Organic
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Organic
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Starting at $3.59
Carrot Seeds - Kuroda Long 8"
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Starting at $3.99
Wildflower Seeds - Partial Shade MixWildflower Seeds - Partial Shade Mix
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Wildflower Seeds - Partial Shade Mix
Starting at $2.99
Lavender Seeds - Munstead
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Heirloom
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Starting at $3.99
Bean Seeds - Bush - MasaiBean Seeds - Bush - Masai
-39%
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Starting at $1.99
Biblical Bread Grain Mix (Organic) - Bulk GrainsBiblical Bread Grain Mix (Organic) - Bulk Grains
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Starting at $11.82
Lettuce Seeds - Crisphead - Webbs Wonderful
Starting at $2.99
Bean Seeds - Bush - Provider (Organic)
Starting at $3.59
Turnip Seeds - Seven Top
Starting at $2.99
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