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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Spelt (Organic) - Sprouting SeedsSpelt (Organic) - Sprouting Seeds
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Organic
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Corn Seeds - Sweet - Sugar Buns F1 Hybridmid size pouch type seed packaging for - Corn Sweet Sugar Buns Hybrid
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Corn Seeds - Sweet - Sugar Buns F1 Hybrid
Starting at $4.09
Yellow Soybeans (Organic) - Bulk Grainssmall size packet type seed packaging for - Yellow Soybeans Organic Bulk Grains & Foods
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Organic
Yellow Soybeans (Organic) - Bulk Grains
Starting at $3.59
Spinach Seeds - Winter Giantsmall size packet type seed packaging for - Spinach Winter Giant
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Spinach Seeds - Winter Giant
Starting at $2.99
Calendula Seeds - Solar Flashback Mix - Organic
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Starting at $4.39
Gourd Bitter IndiaGourd Bitter India
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Gourd Seeds, Bitter - India - Hybrid
Starting at $3.99
Pea Seeds - Snow - Taiwan Sugar (Organic)
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Heirloom
Organic
Pea Seeds - Snow - Taiwan Sugar (Organic)
Starting at $3.39
Mustard Seeds - Spinach (Komatsuna) - Tendergreen
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Heirloom
Mustard Seeds - Spinach (Komatsuna) - Tendergreen
Starting at $3.99
Gourds Seeds - Small Mixmid size pouch type seed packaging for - Gourds Small Mix
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Gourds Seeds - Small Mix
Starting at $3.29
Tomato Seeds - Paste - Super Italian Pastemid size pouch type seed packaging for - Tomato Paste Super Italian Paste
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Tomato Seeds - Paste - Super Italian Paste
Starting at $2.99
Radish Seeds - Easter Egg BlendRadish Seeds - Easter Egg Blend
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Starting at $2.99
Caraway Seedssmall size packet type seed packaging for - Caraway
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Caraway Seeds
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Mustard Seeds - Florida Broadleafmid size pouch type seed packaging for - Mustard Florida Broadleaf
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Mustard Seeds - Florida Broadleaf
Starting at $2.99
Nasturtium Seeds - Empress of Indiamid size pouch type seed packaging for - Nasturtium Empress of India
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Nasturtium Seeds - Empress of India
Starting at $2.99
Tomato Seeds - Slicing - Peron Spraylesssmall size packet type seed packaging for - Tomato Slicing Peron Sprayless
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Tomato Seeds - Slicing - Peron Sprayless
Starting at $3.69
Yu Choy Sum Seeds - Jung Greenmid size pouch type seed packaging for - Yu Choy Sum Jung Green
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Yu Choy Sum Seeds - Jung Green
Starting at $3.99
Squash - Summer - Dark Green Zucchini (Organic)
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Organic
Squash - Summer - Dark Green Zucchini (Organic)
Starting at $3.39
Basil - Cinnamon - Microgreens SeedsBasil - Cinnamon - Microgreens Seeds
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Basil - Cinnamon - Microgreens Seeds
Starting at $10.12
Cosmos Seeds - Candystripesmall size packet type seed packaging for - Cosmos Candystripe
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Corn Seeds - Popcorn - Glass Gemmid size pouch type seed packaging for - Corn Popcorn Glass Gem
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No-Till Pollinator Friendly Cover Crop Mix (Organic)No-Till Pollinator Friendly Cover Crop Mix (Organic)
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Starting at $6.41
Pepper Seeds - Sweet - Mini Belle Mixsmall size packet type seed packaging for - Pepper Sweet Mini Belle Mix
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Paracress Seeds - Toothache Plantmid size pouch type seed packaging for - Paracress Toothache Plant
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Staff Favorite
Paracress Seeds - Toothache Plant
Starting at $3.29
Pepper Seeds - Sweet - Sweet Picklesmall size packet type seed packaging for - Pepper Sweet Sweet Pickle
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Starting at $3.89
Squash Seeds - Summer - Sunburst Hybridmid size pouch type seed packaging for - Squash Summer Sunburst Hybrid
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AAS Winner
Squash Seeds - Summer - Sunburst Hybrid
Starting at $4.79
Lettuce Seeds - Romaine - Little Caesar (Organic)small size packet type seed packaging for - Lettuce Romaine Little Caesar Organic
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Starting at $3.59
Pepper Seeds - Sweet - Cubanellemid size pouch type seed packaging for - Pepper Sweet Cubanelle
-37%
Heirloom
Pepper Seeds - Sweet - Cubanelle
Starting at $1.99
1020 Heavy Duty Microgreens Trays - No Holes - Green - Shallow
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1020 Heavy Duty Microgreens Trays - No Holes - Green...
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Rutabaga Seeds - Laurentian
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Alyssum Seeds - Carpet of Snow
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Parsley Seeds - Plain or Single (Organic)
Starting at $3.59
Onion Seeds - Long - Southport Red Globe
Starting at $2.99
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