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
697 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" }
Sweet Pea Seeds - High ScentSweet Pea Seeds - High Scent
-0
Sweet Pea Seeds - High Scent
Starting at $3.39
Rapeseed - CanolaRapeseed - Canola
-0
Rapeseed - Canola
Starting at $2.99
Pak Choi Seeds - Canton WhitePak Choi Seeds - Canton White
-0
Heirloom
Pak Choi Seeds - Canton White
Starting at $3.99
Sunflower Seeds - Evening Sunsmall size packet type seed packaging for - Sunflower Evening Sun
-0
Heirloom
Sunflower Seeds - Evening Sun
Starting at $2.99
Radish Seeds - Pink Summercicle - Microgreenssmall size packet type seed packaging for - Radish Pink Summercicle Microgreens
-0
Heirloom
Radish Seeds - Pink Summercicle - Microgreens
Starting at $14.11
Corn Seeds - Popcorn - Glass Gem (Organic)mid size pouch type seed packaging for - Tomato Slicing Yellow Perfection Organic
-48%
Organic
Corn Seeds - Popcorn - Glass Gem (Organic)
Starting at $1.99
Fennel - Sweet - Microgreens SeedsFennel - Sweet - Microgreens Seeds
-0
Heirloom
Fennel - Sweet - Microgreens Seeds
Starting at $5.70
Basil Seeds - Persian AASBasil Seeds - Persian AAS
-0
Heirloom
Basil Seeds - Persian AAS
Starting at $3.39
Pepper Seeds - Hot - Hot Portugal (Organic)mid size pouch type seed packaging for - Tomato Slicing Yellow Perfection Organic
-46%
Heirloom
Organic
Pepper Seeds - Hot - Hot Portugal (Organic)
Starting at $2.09
Amaranth Seeds - All Red Leafmid size pouch type seed packaging for - Amaranth All Red Leaf
-0
Amaranth Seeds - All Red Leaf
Starting at $2.99
Bean Seeds - Bush - Sunraymid size pouch type seed packaging for - Zinnia Magellan Series Orange
-0
Heirloom
Bean Seeds - Bush - Sunray
Starting at $2.99
Turnip Seeds - White Globe Roundsmall size packet type seed packaging for - Turnip White Globe Round
-0
Heirloom
Turnip Seeds - White Globe Round
Starting at $2.99
Corn Poppy Special Collection - American LegionCorn Poppy Special Collection - American Legion
-0
Heirloom
Corn Poppy Special Collection - American Legion
$11.30
Basic Growing For Health Kit - Sprouts, Microgreens, and Wheatgrass
-0
Basic Growing For Health Kit - Sprouts, Microgreens, and Wheatgrass
$56.51
Swiss Chard Seeds - Large White Ribbedsmall size packet type seed packaging for - Swiss Chard Large White Ribbed
-0
Heirloom
Swiss Chard Seeds - Large White Ribbed
Starting at $2.99
National Wildflower Collection - 6 Wildflower Mixes for PollinatorsNational Wildflower Collection - 6 Wildflower Mixes for Pollinators
-0
Staff Favorite
National Wildflower Collection - 6 Wildflower Mixes for Pollinators
$48.10
Stainless Steel Quick Pickle Kit + Pickling Cucumber SeedsStainless Steel Quick Pickle Kit + Pickling Cucumber Seeds
-0
Stainless Steel Quick Pickle Kit + Pickling Cucumber Seeds
$17.83
The True Leaf Market Sprouting GuideThe True Leaf Market Sprouting Guide
-0
The True Leaf Market Sprouting Guide
$7.30
Cotton Seeds - Arkansas Green LintCotton Seeds - Arkansas Green Lint
-0
Heirloom
Cotton Seeds - Arkansas Green Lint
Starting at $3.39
Wildflower Seeds - Deer Resistant MixWildflower Seeds - Deer Resistant Mix
-0
Wildflower Seeds - Deer Resistant Mix
Starting at $3.99
Growing Guide 3 Pack White BackgroundGrowing Guide 3 Pack
-0
Growing Guide 3 Pack
$13.04
Swiss Chard Seeds - Barese Dark Green Smooth Leaf - MicrogreensSwiss Chard Seeds - Barese Dark Green Smooth Leaf - Microgreens
-0
Heirloom
Swiss Chard Seeds - Barese Dark Green Smooth Leaf -...
Starting at $5.51
Bag packaging for Organic Growth Plant Food by Mighty Plant, contact customer service at 801-491-8700 for instructions helpPerfect For Any Growing Method!
-0
Organic
Organo Grow™ Plant Food by Mighty Plant
$14.00
Turnip Seeds - Nameniasmall size packet type seed packaging for - Turnip Namenia
-0
Heirloom
Turnip Seeds - Namenia
Starting at $2.99
Parsley Seeds - Plain or Single - MicrogreensParsley Seeds - Plain or Single - Microgreens
-0
Heirloom
Parsley Seeds - Plain or Single - Microgreens
Starting at $4.92
Nasturtium Seeds - Empress of India (Organic)
Starting at $3.59
Shiso Seeds - Bicolor (Organic)
Starting at $3.59
Corn Salad Seeds - French - Microgreens
Starting at $6.58
Strawberry Roots - Everbearing - Seascape Hybrid
$24.95
Radish Seeds - Pink Beauty - Microgreens
Starting at $6.33
Columbine Seeds - Double Mixed
Starting at $2.99
Geopot Fabric Planter - Black Square Bottom With Handles
Starting at $5.50
[ { "featured_image": "files/Nasturtium_Organic_Comp_2.jpg", "secondary_image": "files/Nasturtium_Organic_Comp_3.jpg", "price": 359, "handle": "nasturtium-seeds-empress-of-india-organic", "title": "Nasturtium Seeds - Empress of India (Organic)", "url": "/products/nasturtium-seeds-empress-of-india-organic", "available": false }, { "featured_image": "files/1693494672_Sweet-Pea-High-Scent-comp_5d75f530-1c06-45df-ad1c-72379955c423.jpg", "secondary_image": "files/mountain-valley-seed-company-package_c7fa0bed-7d66-4972-bb6c-0eb1a651f5b4.jpg", "price": 339, "handle": "sweet-pea-seeds-high-scent", "title": "Sweet Pea Seeds - High Scent", "url": "/products/sweet-pea-seeds-high-scent", "available": true }, { "featured_image": "files/rapeseed-canola-Comp.jpg", "secondary_image": "products/yellow-wm-wb-comp.jpg", "price": 299, "handle": "rapeseed-canola", "title": "Rapeseed - Canola", "url": "/products/rapeseed-canola", "available": true }, { "featured_image": "files/cabbage-seeds-pak-choi-canton-white-Comp.jpg", "secondary_image": "files/KZ_1_lb_3fb1bfd6-da01-41bc-8cfc-3c0e5488f1a4.jpg", "price": 399, "handle": "cabbage-seeds-pak-choi-canton-white", "title": "Pak Choi Seeds - Canton White", "url": "/products/cabbage-seeds-pak-choi-canton-white", "available": true }, { "featured_image": "files/1745439032_shiso_bicolor_organic_wm_comp_c1909785-a4a5-4704-b345-f6bddcedcb6a.jpg", "secondary_image": "", "price": 359, "handle": "shiso-seeds-bicolor-organic", "title": "Shiso Seeds - Bicolor (Organic)", "url": "/products/shiso-seeds-bicolor-organic", "available": false }, { "featured_image": "files/sunflower-seeds-evening-sun-Comp.jpg", "secondary_image": "products/MVS-generic-packet-com_099d9a61-9ea3-40f2-9487-bca3b65cb726.jpg", "price": 299, "handle": "sunflower-seeds-evening-sun", "title": "Sunflower Seeds - Evening Sun", "url": "/products/sunflower-seeds-evening-sun", "available": true }, { "featured_image": "files/radish-seeds-pink-summercicle-comp.jpg", "secondary_image": "products/MVS-generic-packet-com_87e36b24-37b2-4c03-8a28-304030811962.jpg", "price": 1411, "handle": "radish-seeds-pink-summercicle", "title": "Radish Seeds - Pink Summercicle - Microgreens", "url": "/products/radish-seeds-pink-summercicle", "available": true }, { "featured_image": "files/1738173031_seeds_corn_popcorn_glass_gem_corn_glass_gem_wm_comp_5942344d-e34b-407c-80b1-7650481c6dc7.jpg", "secondary_image": "files/Sustainable_1_lb.jpg", "price": 199, "handle": "corn-seeds-popcorn-glass-gem-organic", "title": "Corn Seeds - Popcorn - Glass Gem (Organic)", "url": "/products/corn-seeds-popcorn-glass-gem-organic", "available": true }, { "featured_image": "files/sweet-fennel-microgreens-com-wm_1222x1222_2f74f1e6-328a-4427-aa3b-946c3a21410e.jpg", "secondary_image": "products/Seed_Pouch_1_1_1_1_1_1_a13991ff-f96c-4600-9091-aa1cbacd395f.jpg", "price": 570, "handle": "fennel-sweet-microgreens-seeds", "title": "Fennel - Sweet - Microgreens Seeds", "url": "/products/fennel-sweet-microgreens-seeds", "available": true }, { "featured_image": "files/corn-salad-seeds-french-microgreens-Comp.jpg", "secondary_image": "products/Seed_Pouch_1_1_1_e9c2c9b3-3593-4320-95ec-c392bffa4036.jpg", "price": 658, "handle": "corn-salad-seeds-french-microgreens", "title": "Corn Salad Seeds - French - Microgreens", "url": "/products/corn-salad-seeds-french-microgreens", "available": false }, { "featured_image": "files/1733939448_strawberry_roots_everbearing_seascape_comp_a80ea2f1-a33c-4f04-9a81-28b6cd59d14c.jpg", "secondary_image": "", "price": 2495, "handle": "strawberry-roots-everbearing-seascape-hybrid", "title": "Strawberry Roots - Everbearing - Seascape Hybrid", "url": "/products/strawberry-roots-everbearing-seascape-hybrid", "available": false }, { "featured_image": "files/1687357995_Untitled-1_1222x1222_0cae8b94-ff1b-4a9f-bf0c-908e995834d7.jpg", "secondary_image": "files/KZ_1_lb.jpg", "price": 339, "handle": "basil-seeds-persian-aas", "title": "Basil Seeds - Persian AAS", "url": "/products/basil-seeds-persian-aas", "available": true }, { "featured_image": "files/Pepper-Hot-Portugal-Organic.jpg", "secondary_image": "files/Sustainable_1_lb.jpg", "price": 209, "handle": "pepper-seeds-hot-hot-portugal-organic", "title": "Pepper Seeds - Hot - Hot Portugal (Organic)", "url": "/products/pepper-seeds-hot-hot-portugal-organic", "available": true }, { "featured_image": "files/radish-seeds-pink-beauty-microgreens-Comp.jpg", "secondary_image": "products/radish-pink-wb-wm_1.jpg", "price": 633, "handle": "radish-seeds-pink-beauty-microgreens", "title": "Radish Seeds - Pink Beauty - Microgreens", "url": "/products/radish-seeds-pink-beauty-microgreens", "available": false }, { "featured_image": "files/amaranth-seeds-all-red-leaf-Comp.jpg", "secondary_image": "files/MVS_1_lb_024bf8aa-c77c-4c59-a42b-f74fa5c6b247.jpg", "price": 299, "handle": "amaranth-seeds-all-red-leaf", "title": "Amaranth Seeds - All Red Leaf", "url": "/products/amaranth-seeds-all-red-leaf", "available": true }, { "featured_image": "files/Bean-Bush-Sunray.jpg", "secondary_image": "files/MVS_1_lb.jpg", "price": 299, "handle": "bean-seeds-bush-sunray", "title": "Bean Seeds - Bush - Sunray", "url": "/products/bean-seeds-bush-sunray", "available": true }, { "featured_image": "files/turnip-seeds-white-globe-round-Comp.jpg", "secondary_image": "products/MVS-generic-packet-com_2_13588c1a-9d7f-4cf7-839f-2e506c871bfa.jpg", "price": 299, "handle": "turnip-seeds-white-globe-round", "title": "Turnip Seeds - White Globe Round", "url": "/products/turnip-seeds-white-globe-round", "available": true }, { "featured_image": "files/columbine-seeds-double-mixed-Comp.jpg", "secondary_image": "files/Flower_1lb_425ecfaf-0455-4091-8f0b-73ab761f5497.jpg", "price": 299, "handle": "columbine-seeds-double-mixed", "title": "Columbine Seeds - Double Mixed", "url": "/products/columbine-seeds-double-mixed", "available": false }, { "featured_image": "files/corn-poppy-special-collection-american-legion-Comp.jpg", "secondary_image": "files/seeds-corn-poppy-american-legion-corn-poppy-american-legion-seed-wm.jpg", "price": 1130, "handle": "corn-poppy-special-collection-american-legion", "title": "Corn Poppy Special Collection - American Legion", "url": "/products/corn-poppy-special-collection-american-legion", "available": true }, { "featured_image": "files/Geopot-Fabric-Planter-Black-Square-Bottom-With-Handles-Single_fb7ee825-ae38-4d7d-b830-7fcdbb742e78.jpg", "secondary_image": "files/1719341332_Geopot-Fabric-Planter-wm-comp_356cdb1e-883b-47ad-bd39-e12d0bbfb53c.jpg", "price": 550, "handle": "geopot-fabric-planter-black-square-bottom-with-handles", "title": "Geopot Fabric Planter - Black Square Bottom With Handles", "url": "/products/geopot-fabric-planter-black-square-bottom-with-handles", "available": false }, { "featured_image": "files/Basic-Growing-For-Health-Kit-Sprouts-Microgreens-and-Wheatgrass-Comp_2.jpg", "secondary_image": "", "price": 5651, "handle": "basic-growing-for-health-kit-sprouts-microgreens-and-wheatgrass", "title": "Basic Growing For Health Kit - Sprouts, Microgreens, and Wheatgrass", "url": "/products/basic-growing-for-health-kit-sprouts-microgreens-and-wheatgrass", "available": true }, { "featured_image": "files/swiss-chard-seeds-large-white-ribbed-Comp.jpg", "secondary_image": "products/MVS-generic-packet-com_b06ceb83-653a-4045-9b69-6efdca26687e.jpg", "price": 299, "handle": "swiss-chard-seeds-large-white-ribbed", "title": "Swiss Chard Seeds - Large White Ribbed", "url": "/products/swiss-chard-seeds-large-white-ribbed", "available": true }, { "featured_image": "files/national-wildflower-collection-6-wildflower-mixes-for-pollinators-comp.jpg", "secondary_image": "products/National-Wildflower-Collection-wood-wm-comp.jpg", "price": 4810, "handle": "national-wildflower-collection-6-wildflower-mixes-for-pollinators", "title": "National Wildflower Collection - 6 Wildflower Mixes for Pollinators", "url": "/products/national-wildflower-collection-6-wildflower-mixes-for-pollinators", "available": true }, { "featured_image": "files/stainless-steel-quick-pickle-kit-Comp.jpg", "secondary_image": "files/Quick-Pickle-Kit-Trellis-white-background-comp_09c7b50e-b552-4fef-8383-2906b3d770d1.jpg", "price": 1783, "handle": "stainless-steel-quick-pickle-kit", "title": "Stainless Steel Quick Pickle Kit + Pickling Cucumber Seeds", "url": "/products/stainless-steel-quick-pickle-kit", "available": true }, { "featured_image": "files/the-true-leaf-market-sprouting-guide-Comp.jpg", "secondary_image": "products/TLM-Sprouting-Guide-Opened-book-wm-comp.jpg", "price": 730, "handle": "the-true-leaf-market-sprouting-guide", "title": "The True Leaf Market Sprouting Guide", "url": "/products/the-true-leaf-market-sprouting-guide", "available": true }, { "featured_image": "files/1740078882_cotton_arkansas_green_lint_2_support_photo_wm_comp_ff14b3ce-a49f-4901-a0d5-abc312928e90.jpg", "secondary_image": "files/1740078386_cotton_arkansas_green_lint_1_support_photo_comp_47cd9451-f99e-498d-ab60-6ea403c21465.jpg", "price": 339, "handle": "cotton-seeds-arkansas-green-lint", "title": "Cotton Seeds - Arkansas Green Lint", "url": "/products/cotton-seeds-arkansas-green-lint", "available": true }, { "featured_image": "files/deer_resistant_wildflower_seed_mix_comp.jpg", "secondary_image": "files/deer_resistant_wildflower_seed_mix_seed_comp.jpg", "price": 399, "handle": "wildflower-seeds-deer-resistant-mix", "title": "Wildflower Seeds - Deer Resistant Mix", "url": "/products/wildflower-seeds-deer-resistant-mix", "available": true }, { "featured_image": "files/Growing-Guide-3-Pack-comp-wb_f51bc808-8f5d-41dc-b5e3-fc94863618ab.jpg", "secondary_image": "files/Sprouting-guide-comp_74af5db6-5df9-420e-a400-667dc5f35cf5.jpg", "price": 1304, "handle": "growing-guide-3-pack", "title": "Growing Guide 3 Pack", "url": "/products/growing-guide-3-pack", "available": true }, { "featured_image": "files/swiss-chard-seeds-barese-dark-green-smooth-leaf-microgreens-1-Comp.jpg", "secondary_image": "products/swiss-chard-dark-green-wb-wm-opt_1.jpg", "price": 551, "handle": "swiss-chard-seeds-barese-dark-green-smooth-leaf-microgreens-1", "title": "Swiss Chard Seeds - Barese Dark Green Smooth Leaf - Microgreens", "url": "/products/swiss-chard-seeds-barese-dark-green-smooth-leaf-microgreens-1", "available": true }, { "featured_image": "files/1686149300_CopyofTL-WM-Black-2023-06-07T081056.984.jpg", "secondary_image": "files/Organo_Grow_Plant_Food_by_Mighty_Plant_Growing_Methods_554a2e58-bc5e-40f7-a01e-add81115affe.jpg", "price": 1400, "handle": "organic-growth-plant-food-by-mighty-plant", "title": "Organo Grow™ Plant Food by Mighty Plant", "url": "/products/organic-growth-plant-food-by-mighty-plant", "available": true }, { "featured_image": "files/turnip-seeds-namenia-Comp.jpg", "secondary_image": "products/Seed_Packet_a27caa94-374c-4fac-83ed-e57c38dbb1e2.jpg", "price": 299, "handle": "turnip-seeds-namenia", "title": "Turnip Seeds - Namenia", "url": "/products/turnip-seeds-namenia", "available": true }, { "featured_image": "files/parsley-seeds-plain-or-single-1-Comp.jpg", "secondary_image": "products/parsley-plain-or-single-microgreens-wb-wm-opt.jpg", "price": 492, "handle": "parsley-seeds-plain-or-single-1", "title": "Parsley Seeds - Plain or Single - Microgreens", "url": "/products/parsley-seeds-plain-or-single-1", "available": true } ]