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
2011 Items
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Swiss Chard Seeds - Rhubarbmid size pouch type seed packaging for - Swiss Chard Rhubarb
-0
Heirloom
Swiss Chard Seeds - Rhubarb
Starting at $2.99
Carnation Seeds - Lillipot Mix (Treated)mid size pouch type seed packaging for - Carnation Lillipot Mix Treated
-0
Carnation Seeds - Lillipot Mix (Treated)
Starting at $5.59
Tomato Seeds - Slicing - Dutchmansmall size packet type seed packaging for - Tomato Slicing Dutchman
-0
Heirloom
Tomato Seeds - Slicing - Dutchman
Starting at $2.99
Sorghum Seeds - Multicolored Broomcornmid size pouch type seed packaging for - Sorghum Multicolored Broomcorn
-0
Staff Favorite
Sorghum Seeds - Multicolored Broomcorn
Starting at $2.99
Wildflower Seeds - Dryland PollinatorsWildflower Seeds - Dryland Pollinators
-0
Wildflower Seeds - Dryland Pollinators
$15.14
Squash Winter Cushaw Green Stripedmid size pouch type seed packaging for - Squash Winter Cushaw Green Striped
-0
Heirloom
Squash Seeds - Winter - Cushaw Green Striped
Starting at $2.99
Melon Seeds - Piel de SapoMelon Seeds - Piel de Sapo
-0
Heirloom
Melon Seeds - Piel de Sapo
Starting at $2.99
Mustard Seeds - Nemagonmid size pouch type seed packaging for - Mustard Nemagon
-0
Mustard Seeds - Nemagon
Starting at $4.29
Tomato Seeds - Cherry - Currant Yellowsmall size packet type seed packaging for - Tomato Cherry Currant Yellow
-0
Heirloom
Tomato Seeds - Cherry - Currant Yellow
Starting at $3.79
Lettuce Seeds - Tangosmall size packet type seed packaging for - Lettuce Tango
-0
Heirloom
Lettuce Seeds - Tango
Starting at $2.99
Watermelon Seeds - Picnic - Kleckley's Sweetsmall size packet type seed packaging for - Watermelon Picnic Kleckleys Sweet
-0
Heirloom
Watermelon Seeds - Picnic - Kleckley's Sweet
Starting at $2.99
Watermelon Seeds - Icebox - Yellow Petitesmall size packet type seed packaging for - Watermelon Icebox Yellow Petite
-0
Heirloom
Watermelon Seeds - Icebox - Yellow Petite
Starting at $3.79
Squash Seeds - Winter - Queensland Bluesmall size packet type seed packaging for - Squash Winter Queensland Blue
-0
Heirloom
Squash Seeds - Winter - Queensland Blue
Starting at $3.79
Mustard Seeds - Summer Fest Komatsuna Hybridmid size pouch type seed packaging for - Mustard Summer Fest Komatsuna Hybrid
-0
Mustard Seeds - Summer Fest Komatsuna Hybrid
Starting at $3.99
Celosia Seeds - Crested - Armor Mixmid size pouch type seed packaging for - Celosia Crested Armor Mix
-0
Celosia Seeds - Crested - Armor Mix
Starting at $9.60
Lettuce Seeds - Crisphead - Hanson Improvedmid size pouch type seed packaging for - Lettuce Crisphead Hanson Improved
-0
Heirloom
Lettuce Seeds - Crisphead - Hanson Improved
Starting at $2.99
Squash Seeds - Lakotasmall size packet type seed packaging for - Squash Lakota
-0
Heirloom
Squash Seeds - Lakota
Starting at $3.09
Lettuce Seeds - Romaine / COS - Rouge D'Hiversmall size packet type seed packaging for - Lettuce Romaine / COS Rouge DHiver
-0
Heirloom
Lettuce Seeds - Romaine / COS - Rouge D'Hiver
Starting at $2.99
Bean Seeds - Bush -  Purple Queenmid size pouch type seed packaging for - Bean Bush Purple Queen
-0
Heirloom
Bean Seeds - Bush - Purple Queen
Starting at $3.39
Adzuki Bean (Organic) - Bulk Grains & FoodsAdzuki Bean (Organic) - Bulk Grains & Foods
-0
Organic
Adzuki Bean (Organic) - Bulk Grains & Foods
Starting at $3.49
Pumpkin Seeds - Blue Harvest F1mid size pouch type seed packaging for - Pumpkin Blue Harvest F1
-51%
Pumpkin Seeds - Blue Harvest F1
Starting at $1.99
Torenia Seeds - Kauai Mix (Pelleted)mid size pouch type seed packaging for - Torenia Kauai Mix Pelleted
-0
Torenia Seeds - Kauai Mix (Pelleted)
Starting at $4.79
Squash Seeds - Summer - Fordhook Zucchini (Organic)small size packet type seed packaging for - Squash Summer Fordhook Zucchini Organic
-0
AAS Winner
Heirloom
Organic
Squash Seeds - Summer - Fordhook Zucchini (Organic)
Starting at $3.59
Pumpkin Seeds - Harvest Jack F1small size packet type seed packaging for - Pumpkin Harvest Jack F1
-0
Pumpkin Seeds - Harvest Jack F1
Starting at $3.99
Broccoli Raab Seeds - Sorrentomid size pouch type seed packaging for - Broccoli Raab Sorrento
-0
Heirloom
Broccoli Raab Seeds - Sorrento
Starting at $3.39
Radish Seeds - Shirahime Hatsuka Daikonmid size pouch type seed packaging for - Radish Shirahime Hatsuka Daikon
-0
Heirloom
Radish Seeds - Shirahime Hatsuka Daikon
Starting at $3.99
Cucumber Seeds - Marketersmall size packet type seed packaging for - Cucumber Marketer
-0
AAS Winner
Heirloom
Cucumber Seeds - Marketer
Starting at $2.99
Broccoli Seeds - Chinese Broccoli - Big Stemmid size pouch type seed packaging for - Broccoli Chinese Broccoli Big Stem
-0
Heirloom
Broccoli Seeds - Chinese Broccoli - Big Stem
Starting at $3.99
Seed Potatoes - Spring - Red Pontiac (Organic)
Starting at $19.33
Swiss Chard Seeds - Yellow
Starting at $2.99
Rudbeckia Seeds - Cherry Brandy
Starting at $5.79
Asparagus Crowns - Spring - Mary Washington
Starting at $7.47
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