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
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1078 Items
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Radish Seeds - German Giant - Organicsmall size packet type seed packaging for - Radish German Giant Organic
-0
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Organic
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Starting at $3.59
Swiss Chard Seeds - Pink Lipstickmid size pouch type seed packaging for - Zinnia Magellan Series Orange
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Starting at $2.99
Columbine Seeds - McKana Giant AASmid size pouch type seed packaging for - Columbine McKana Giant AAS
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Starting at $3.39
Radish Seeds - Chinese - Green Meat Luobomid size pouch type seed packaging for - Radish Chinese Green Meat Luobo
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Starting at $3.99
Radish Seeds - Black Spanish Round - Organicsmall size packet type seed packaging for - Radish Black Spanish Round Organic
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Starting at $3.59
Mustard Seeds - WasabiMustard Seeds - Wasabi
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Mustard Seeds - Wasabi
Starting at $3.99
Endive Seeds - Salad Kingsmall size packet type seed packaging for - Endive Salad King
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Endive Seeds - Salad King
Starting at $2.99
Triticale (Organic) - Grass SeedsTriticale (Organic) - Grass Seeds
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Organic
Triticale (Organic) - Grass Seeds
Starting at $8.56
Turnip Seeds - Shogoinsmall size packet type seed packaging for - Turnip Shogoin
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Turnip Seeds - Shogoin
Starting at $2.99
Arugula Seeds - Wild (Organic)small size packet type seed packaging for - Arugula Wild Organic
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Organic
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Starting at $3.79
Chinese Cabbage Seeds - Spring Crisp - Hybridmid size pouch type seed packaging for - Chinese Cabbage Spring Crisp Hybrid
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Chinese Cabbage Seeds - Spring Crisp - Hybrid
Starting at $3.99
Amaranth Seeds - White Leafmid size pouch type seed packaging for - Amaranth White Leaf
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Lettuce Seeds - Butterhead - White Bostonsmall size packet type seed packaging for - Lettuce Butterhead White Boston
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Lettuce Seeds - Butterhead - White Boston
Starting at $2.99
Pea Seeds - Shelling - Alaskasmall size packet type seed packaging for - Pea Shelling Alaska
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Pea Seeds - Shelling - Alaska
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Pea Seeds - Shelling - Patio Pride AAS (Organic)small size packet type seed packaging for - Pea Shelling Patio Pride AAS Organic
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Organic
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Onion Seeds - Intermediate - Red Cipollinismall size packet type seed packaging for - Onion Intermediate Red Cipollini
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Onion Seeds - Intermediate - Red Cipollini
Starting at $2.99
Lettuce Seeds - Leaf - Flamemid size pouch type seed packaging for - Lettuce Leaf Flame
-28%
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Lettuce Seeds - Leaf - Flame
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Beet Seeds - Green Top Bunching - Organicsmall size packet type seed packaging for - Beet Green Top Bunching Organic
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Parsley Seeds - Hamburg Rootedsmall size packet type seed packaging for - Parsley Hamburg Rooted
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White Ladino CloverWhite Ladino Clover
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Lettuce Seeds - Merveille Des Quatre Saisonssmall size packet type seed packaging for - Lettuce Merveille Des Quatre Saisons
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Nasturtium Seeds - Jewel Mix (Organic)Nasturtium Seeds - Jewel Mix (Organic)
-17%
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Nasturtium Seeds - Jewel Mix (Organic)
Starting at $11.39
Turnip Seeds - Snowballsmall size packet type seed packaging for - Turnip Snowball
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Turnip Seeds - Snowball
Starting at $2.99
Cabbage Seeds - Drumheadsmall size packet type seed packaging for - Cabbage Drumhead
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Pak Choi Seeds - Little Shanghai - Hybridmid size pouch type seed packaging for - Pak Choi Little Shanghai Hybrid
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Toraji Seeds - Balloon Flower
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Pyrethrum (Painted Daisy) Seeds - Robinsons Mixture
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Salsify Seeds - Scorzonera Black Root
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Alyssum Seeds - Rosie O Day
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Lettuce Seeds - Tango - Organic
Starting at $3.59
Onion Sets - Snowball White
$6.48 $12.95
Kohlrabi Seeds - Superschmelz Giant White
Starting at $3.29
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