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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
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Bean Seeds - Bush - Henderson Limamid size pouch type seed packaging for - Bean Bush Henderson Lima
-0
Heirloom
Bean Seeds - Bush - Henderson Lima
Starting at $3.09
Cilantro Seeds - Slow Bolt (Organic) - Microgreens Seeds
-0
Heirloom
Organic
Staff Favorite
Cilantro Seeds - Slow Bolt (Organic) - Microgreens Seeds
Starting at $6.57
Squash Seeds - Winter - Sweet MeatSquash Seeds - Winter - Sweet Meat
-0
Heirloom
Squash Seeds - Winter - Sweet Meat
Starting at $2.99
Cucumber Seeds - Muncher Burpless (Organic)small size packet type seed packaging for - Cucumber Muncher Burpless Organic
-0
Heirloom
Cucumber Seeds - Muncher Burpless (Organic)
Starting at $3.59
Melon Seeds - Cantaloupe - Imperial 45mid size pouch type seed packaging for - Melon Cantaloupe Imperial 45
-0
AAS Winner
Heirloom
Melon Seeds - Cantaloupe - Imperial 45
Starting at $3.09
Cucumber Seeds - Homemade PicklesCucumber Seeds - Homemade Pickles
-28%
Heirloom
Cucumber Seeds - Homemade Pickles
Starting at $1.99
Pea - Snow - Dwarf Sugar Grey - Microgreens SeedsPea - Snow - Dwarf Sugar Grey - Microgreens Seeds
-0
Heirloom
Pea - Snow - Dwarf Sugar Grey - Microgreens Seeds
Starting at $10.68
Bean - Bush - Broad Windsor Fava - Cover Crop Seedssmall size packet type seed packaging for - Bean Broad Windsor Fava Cover Crop
-0
Heirloom
Bean - Bush - Broad Windsor Fava - Cover Crop...
Starting at $2.99
Nasturtium Seeds - Alaska
-0
Nasturtium Seeds - Alaska
Starting at $2.99
custom bag packaging for Coco Coir Netted Seed Starter Pellets - UnamendedCoco Coir Netted Seed Starter Pellets - Unamended
-0
Coco Coir Netted Seed Starter Pellets - Unamended
Starting at $4.19
Bean Seeds - Bush - Providersmall size packet type seed packaging for - Bean Bush Provider
-0
Heirloom
Bean Seeds - Bush - Provider
Starting at $2.99
Pumpkin Seeds - Big Maxsmall size packet type seed packaging for - Pumpkin Big Max
-0
Heirloom
Pumpkin Seeds - Big Max
Starting at $2.99
Red Cabbage Microgreens SeedsRed Cabbage Microgreens Seeds
-0
Heirloom
Red Cabbage Microgreens Seeds
Starting at $5.94
Oat Seeds - Hulless - Organic
-0
Heirloom
Organic
Oat Seeds - Hulless - Organic
Starting at $3.59
Leek Seeds - American Flag Leek - Organicmid size pouch type seed packaging for - Leek American Flag Leek Organic
-0
Heirloom
Organic
Leek Seeds - American Flag Leek - Organic
Starting at $3.89
Sorrel Seeds - Red Veinedmid size pouch type seed packaging for - Sorrel Red Veined
-0
Heirloom
Staff Favorite
Sorrel Seeds - Red Veined
Starting at $3.39
Lettuce Seeds - Romaine - Freckles
-33%
Heirloom
Lettuce Seeds - Romaine - Freckles
Starting at $1.99
Lentil - Green (Organic) - Sprouting SeedsLentil - Green (Organic) - Sprouting Seeds
-0
Heirloom
Organic
Lentil - Green (Organic) - Sprouting Seeds
Starting at $6.64
Tobacco Seeds - Burley 21small size packet type seed packaging for - Tobacco Burley 21
-0
Heirloom
Tobacco Seeds - Burley 21
Starting at $2.99
Bean Seeds - Bush - Strikesmall size packet type seed packaging for - Bean Bush Strike
-0
Heirloom
Bean Seeds - Bush - Strike
Starting at $2.99
Cabbage Seeds - Late Flat Dutchmid size pouch type seed packaging for - Cabbage Late Flat Dutch
-0
Heirloom
Cabbage Seeds - Late Flat Dutch
Starting at $2.99
Cilantro Seeds - Leisure Splits (Organic)Cilantro Seeds - Leisure Splits (Organic)
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Heirloom
Organic
Staff Favorite
Cilantro Seeds - Leisure Splits (Organic)
Starting at $3.59
custom plastic bottle packaging with twist off cap FloraGro
-0
FloraGro Hydroponic Microgreens Nutrients
Starting at $13.26
Einkorn Grain Seeds (Organic)Einkorn Grain Seeds (Organic)
-0
Heirloom
Organic
Einkorn Grain Seeds (Organic)
Starting at $3.59
Kale PremierKale Premier
-33%
Heirloom
Kale Seeds - Premier
Starting at $1.99
Thyme Seeds - Winter
-0
Thyme Seeds - Winter
Starting at $2.99
Melon Seeds - Cantaloupe - Hearts of Gold
-0
Heirloom
Melon Seeds - Cantaloupe - Hearts of Gold
Starting at $2.79
Bean Seeds - Bush - Roma IIsmall size packet type seed packaging for - Bean Bush Roma II
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Heirloom
Bean Seeds - Bush - Roma II
Starting at $2.63
French Marigold Seeds - Petite Mixture
Starting at $2.99
Parsley Seeds - Italian Giant (Organic)
Starting at $3.59
Granny's Garden Heirloom Seeds Collection
$12.99 $24.19
Radish Seeds - Watermelon
Starting at $3.99
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