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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.

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Legend: H for Heirloom, O for Organic, A for AAS Winner, F for staff favorites
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Pepper Seeds - Hot - Padronmid size pouch type seed packaging for - Pepper Hot Padron
-0
Heirloom
Pepper Seeds - Hot - Padron
Starting at $2.99
Pepper Seeds - Hot - Mariachi HybridPepper Seeds - Hot - Mariachi Hybrid
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AAS Winner
Pepper Seeds - Hot - Mariachi Hybrid
Starting at $5.39
Pepper Seeds - Hot - NuMex Sandiasmall size packet type seed packaging for - Pepper Hot NuMex Sandia
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Heirloom
Pepper Seeds - Hot - NuMex Sandia
Starting at $2.99
Tomato Seeds - Slicing - Calypsomid size pouch type seed packaging for - Tomato Slicing Calypso
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Tomato Seeds - Slicing - Calypso
Starting at $2.99
Melon Seeds - Cantaloupe - Sierra Gold (Organic)small size packet type seed packaging for - Melon Cantaloupe Sierra Gold Organic
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Heirloom
Organic
Melon Seeds - Cantaloupe - Sierra Gold (Organic)
Starting at $3.59
Cardoon Seeds - Ivory Whitesmall size packet type seed packaging for - Cardoon Ivory White
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Cardoon Seeds - Ivory White
Starting at $2.99
Chinese Cabbage Seeds - Yukina Savoymid size pouch type seed packaging for - Chinese Cabbage Yukina Savoy
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Chinese Cabbage Seeds - Yukina Savoy
Starting at $3.99
Beet Seeds - Boltardy
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Beet Seeds - Boltardy
Starting at $2.99
Tomato Seeds - Paste - Golden Romamid size pouch type seed packaging for - Tomato Paste Golden Roma
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Heirloom
Tomato Seeds - Paste - Golden Roma
Starting at $2.99
Pepper Seeds - Hot - Small Red Chilismall size packet type seed packaging for - Pepper Hot Small Red Chili
-39%
Heirloom
Pepper Seeds - Hot - Small Red Chili
Starting at $1.99
Pepper Seeds - Hot - Japanese Santakamid size pouch type seed packaging for - Pepper Hot Japanese Santaka
-50%
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Pepper Seeds - Hot - Japanese Santaka
Starting at $1.99
Melon Seeds - Charantais - Hakucho Hybridmid size pouch type seed packaging for - Melon Charantais Hakucho Hybrid
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Melon Seeds - Charantais - Hakucho Hybrid
Starting at $3.99
Pumpkin Seeds - Casper - Organicsmall size packet type seed packaging for - Pumpkin Casper Organic
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Heirloom
Organic
Pumpkin Seeds - Casper - Organic
Starting at $3.59
Gourd Seeds - Dipper - Extra Long Handlesmall size packet type seed packaging for - Gourd Dipper Extra Long Handle
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Gourd Seeds - Dipper - Extra Long Handle
Starting at $2.99
Pumpkin Seeds - Howden - Organicsmall size packet type seed packaging for - Pumpkin Howden Organic
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Heirloom
Organic
Pumpkin Seeds - Howden - Organic
Starting at $3.59
Squash Seeds - Summer - Bianco Lungo Cylindrico Zucchinismall size packet type seed packaging for - Squash Summer Bianco Lungo Cylindrico Zucchini
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Heirloom
Squash Seeds - Summer - Bianco Lungo Cylindrico Zucchini
Starting at $2.99
Rapeseed - CanolaRapeseed - Canola
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Rapeseed - Canola
Starting at $2.99
Carrot Seeds - Samurai Redmid size pouch type seed packaging for - Carrot Samurai Red
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Heirloom
Carrot Seeds - Samurai Red
Starting at $3.99
Melon Seeds - Casaba - Sungold (Organic)small size packet type seed packaging for - Melon Casaba Sungold Organic
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Organic
Melon Seeds - Casaba - Sungold (Organic)
Starting at $3.59
Tomato Seeds - Cherry - Small Red Cherry (Organic)mid size pouch type seed packaging for - Tomato Cherry Small Red Cherry Organic
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Tomato Seeds - Cherry - Small Red Cherry (Organic)
Starting at $4.29
Pumpkin Seeds - Spookie - Organicsmall size packet type seed packaging for - Pumpkin Spookie Organic
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Organic
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Starting at $3.59
Eggplant Seeds - Kyoto Egg - Hybridmid size pouch type seed packaging for - Eggplant Kyoto Egg Hybrid
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Eggplant Seeds - Kyoto Egg - Hybrid
Starting at $3.99
Radish Seeds - Sparkler White Top - Organicsmall size packet type seed packaging for - Radish Sparkler White Top Organic
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Heirloom
Organic
Radish Seeds - Sparkler White Top - Organic
Starting at $3.59
Pak Choi Seeds - Canton WhitePak Choi Seeds - Canton White
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Pak Choi Seeds - Canton White
Starting at $3.99
Pea Seeds - Shelling - Tom Thumb (Organic)small size packet type seed packaging for - Pea Shelling Tom Thumb Organic
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Pea Seeds - Shelling - Tom Thumb (Organic)
Starting at $6.92
Lettuce Seeds - Batavian - Chrystalsmall size packet type seed packaging for - Lettuce Batavian Chrystal
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Lettuce Seeds - Batavian - Chrystal
Starting at $2.99
Melon Seeds - Cantaloupe - IroquoisMelon Seeds - Cantaloupe - Iroquois
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Melon Seeds - Cantaloupe - Iroquois
Starting at $2.99
Corn Seeds - Flint - Ornamental - Rainbow (Multicolors)small size packet type seed packaging for - Corn Flint Ornamental Rainbow Multicolors
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Heirloom
Corn Seeds - Flint - Ornamental - Rainbow (Multicolors)
Starting at $3.79
Tomato Seeds - Cherry - Manitobasmall size packet type seed packaging for - Tomato Cherry Manitoba
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Tomato Seeds - Cherry - Manitoba
Starting at $2.99
Squash Seeds - Summer - Black Zucchini (Organic)
Starting at $3.89
Mustard Seeds - Tokyo Bekana - Organic
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Tomato Seeds - Slicing - Green Zebra Giant
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