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
8 Items
{ "manual": "Featured", "most-relevant": "Most relevant", "best-selling": "Best selling", "title-ascending": "Alphabetically, A-Z", "title-descending": "Alphabetically, Z-A", "price-ascending": "Price, low to high", "price-descending": "Price, high to low", "created-ascending": "Date, old to new", "created-descending": "Date, new to old" }
Beet - Detroit Dark Red (Conventional) - Microgreens Seedsmid size pouch type seed packaging for - Beet Detroit Dark Red Conventional Microgreens
-0
Heirloom
Beet - Detroit Dark Red (Conventional) - Microgreens Seeds
Starting at $8.58
Swiss Chard - Ruby Red - Microgreens SeedsSwiss Chard - Ruby Red - Microgreens Seeds
-0
Heirloom
Swiss Chard - Ruby Red - Microgreens Seeds
Starting at $5.50
Beet - Bulls Blood - Microgreens SeedsBeet - Bulls Blood - Microgreens Seeds
-10%
Heirloom
Beet - Bulls Blood - Microgreens Seeds
Starting at $5.85
Beet - Microgreens SeedsBeet - Microgreens Seeds
-0
Heirloom
Beet - Microgreens Seeds
Starting at $5.30
Swiss Chard - Pink Lipstick - Microgreens Seedsmid size pouch type seed packaging for - Zinnia Magellan Series Orange
-0
Heirloom
Swiss Chard - Pink Lipstick - Microgreens Seeds
Starting at $5.44
Chrysanthemum Seeds - Broad Leaf, Edible - MicrogreensChrysanthemum Seeds - Broad Leaf, Edible - Microgreens
-8%
Heirloom
Chrysanthemum Seeds - Broad Leaf, Edible - Microgreens
Starting at $4.99
Swiss Chard - Rainbow Mixture - Microgreens Seeds
Starting at $8.30
Sorrel - Large Leaf - Microgreens Seeds
Starting at $7.89
[ { "featured_image": "files/Beet_Detroit_Dark_Red_comp_606a3e7b-1afa-433b-afcb-8bb3864f2067.jpg", "secondary_image": "products/non-gmo-seed-bag-sm_f6b5a43c-4a88-4ed8-84e6-b06edd431328.png", "price": 858, "handle": "beet-detroit-dark-red-microgreens-seeds", "title": "Beet - Detroit Dark Red (Conventional) - Microgreens Seeds", "url": "/products/beet-detroit-dark-red-microgreens-seeds", "available": true }, { "featured_image": "files/swiss-chard-ruby-red-microgreens-2-wm_700_1222x1222_28e73769-c99c-449f-80bc-f1a93e30efe7.jpg", "secondary_image": "products/swiss-chard-ruby-red-seeds-wm_700.jpg", "price": 550, "handle": "swiss-chard-ruby-red-microgreens-seeds", "title": "Swiss Chard - Ruby Red - Microgreens Seeds", "url": "/products/swiss-chard-ruby-red-microgreens-seeds", "available": true }, { "featured_image": "files/Beet-Bulls-Blood-Microgreen_1222x1222_388f092e-ec8a-46ca-b92e-660b7da1553c.jpg", "secondary_image": "products/beet-bulls-blood-seeds-wm_700.jpg", "price": 585, "handle": "beet-bulls-blood-microgreens-seeds", "title": "Beet - Bulls Blood - Microgreens Seeds", "url": "/products/beet-bulls-blood-microgreens-seeds", "available": true }, { "featured_image": "files/1713377765_White-Albino-Beet-microgreen-wm-comp_a0b326c8-84b7-4789-adb8-e28e4ecae409.jpg", "secondary_image": "products/beet-mix-microgreens-wm.jpg", "price": 530, "handle": "beet-seeds-microgreens", "title": "Beet - Microgreens Seeds", "url": "/products/beet-seeds-microgreens", "available": true }, { "featured_image": "files/Swiss-Chard-Rainbow-Mixture_712be746-7e39-4ee8-a1c2-cc037301b2a0.jpg", "secondary_image": "products/swiss-chard-rainbow-mixture-seeds-wm_700.jpg", "price": 830, "handle": "swiss-chard-rainbow-mixture-microgreens-seeds", "title": "Swiss Chard - Rainbow Mixture - Microgreens Seeds", "url": "/products/swiss-chard-rainbow-mixture-microgreens-seeds", "available": false }, { "featured_image": "files/Swiss-Chard-Pink-Lipstick-Microgreens-Seeds-comp.jpg", "secondary_image": "files/MVS_1_lb.jpg", "price": 544, "handle": "swiss-chard-pink-microgreens-seeds", "title": "Swiss Chard - Pink Lipstick - Microgreens Seeds", "url": "/products/swiss-chard-pink-microgreens-seeds", "available": true }, { "featured_image": "files/Sorrel-Large-Leaf-Microgreens-Seeds-comp.jpg", "secondary_image": "products/sorrel-lg-leaf-seeds-wm_700.jpg", "price": 789, "handle": "sorrel-large-leaf-microgreens-seeds", "title": "Sorrel - Large Leaf - Microgreens Seeds", "url": "/products/sorrel-large-leaf-microgreens-seeds", "available": false }, { "featured_image": "files/chrysanthemum-broad-leaf-edible-microgreens-seeds-Comp.jpg", "secondary_image": "products/edible-chrysanthemum-seeds-wm_700_01412303-0a6d-4c77-a6e4-d1b33731c938.jpg", "price": 499, "handle": "chrysanthemum-broad-leaf-edible-microgreens-seeds", "title": "Chrysanthemum Seeds - Broad Leaf, Edible - Microgreens", "url": "/products/chrysanthemum-broad-leaf-edible-microgreens-seeds", "available": true } ]