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
2353 Items
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Pepper Seeds - Hot - Cowhorn Hotsmall size packet type seed packaging for - Pepper Hot Cowhorn Hot
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Tomato Seeds - Slicing - Paul Robesonsmall size packet type seed packaging for - Tomato Slicing Paul Robeson
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Chicory Seeds - Oasissmall size packet type seed packaging for - Chicory Oasis
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Chicory Seeds - Oasis
Starting at $2.99
Gourds Seeds - Dipper Long Handlemid size pouch type seed packaging for - Gourds Dipper Long Handle
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Tomato Seeds - Salad - Stupicemid size pouch type seed packaging for - Tomato Salad Stupice
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Pepper Seeds - Hot - Korean Yeori Gochu - Wa Mae Wo Hybridmid size pouch type seed packaging for - Pepper Hot Korean Yeori Gochu Wa Mae Wo Hybrid
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Pepper Seeds - Hot - Korean Yeori Gochu - Wa...
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Chrysanthemum Greens Seeds - Garland Round Leafmid size pouch type seed packaging for - Chrysanthemum Greens Garland Round Leaf
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Mustard Seeds - Mizuna - Organic
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Organic
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Squash Seeds - Tatumemid size pouch type seed packaging for - Squash Tatume
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Squash Seeds - Tatume
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Cucumber Seeds - Greenhouse Long Burpless F1small size packet type seed packaging for - Cucumber Greenhouse Long Burpless F1
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Cucumber Seeds - Greenhouse Long Burpless F1
Starting at $4.99
Orach Seeds - Aurora (Organic)small size packet type seed packaging for - Orach Aurora Organic
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Organic
Orach Seeds - Aurora (Organic)
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Melon Seeds - Cantaloupe - Planters Jumbomid size pouch type seed packaging for - Melon Cantaloupe Planters Jumbo
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Melon Seeds - Cantaloupe - Planters Jumbo
Starting at $2.99
Eggplant Seeds - Odyssey F1 Hybridsmall size packet type seed packaging for - Eggplant Odyssey F1 Hybrid
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Eggplant Seeds - Odyssey F1 Hybrid
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Pepper Seeds - Sweet - Himo Togarashimid size pouch type seed packaging for - Pepper Sweet Himo Togarashi
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Pepper Seeds - Sweet - Himo Togarashi
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Mustard Seeds - Tokyo BekanaMustard Seeds - Tokyo Bekana
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Squash Seeds - Summer - Scallop Jaune et Vertesmall size packet type seed packaging for - Squash Summer Scallop Jaune et Verte
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Tomato Seeds - Cherry - Cherry OrangeTomato Seeds - Cherry - Cherry Orange
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Gourd Seeds - Nam Tao Yai - Hybridmid size pouch type seed packaging for - Gourd Nam Tao Yai Hybrid
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Lentil Seeds - Red - Organic
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Aquadulce Fava Bean - Cover Crop Seedsmid size pouch type seed packaging for - Aquadulce Fava Bean Cover Crop
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Pepper Seeds - Sweet - Jimmy Nardello (Organic)small size packet type seed packaging for - Pepper Sweet Jimmy Nardello Organic
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$4.39
Pepper Seeds - Hot - Cascabellasmall size packet type seed packaging for - Pepper Hot Cascabella
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Pepper Seeds - Hot - Cascabella
Starting at $3.89
Pepper Seeds - Hot - Biquinho Yellowmid size pouch type seed packaging for - Pepper Hot Biquinho Yellow
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Pepper Seeds - Hot - Biquinho Yellow
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Watermelon Seeds - Giant - Black Diamond Yellow BellyWatermelon Seeds - Giant - Black Diamond Yellow Belly
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Watermelon Seeds - Giant - Black Diamond Yellow Belly
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Lettuce Seeds - Tricolor Romaine Blend - Organic
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Cucumber Seeds - Double Yield (Organic)
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Shallot Sets - Red
$7.33 $14.65
Squash Seeds - Winter - Winter Harvest Blend (Organic)
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Pea Seeds - Mammoth Melting Sugar - Organic
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Endive Seeds - Italian Red Stem Dandelion
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Melon Seeds - Cantaloupe - Honey Rock (Organic)
Starting at $3.59
Chinese Leek Seeds - Broad Leaved Nira
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