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
68 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" }
contact customer service at 801-491-8700 for instructions helpPerlite Soil Amendment
-0
Perlite Soil Amendment
Starting at $10.60
Swiss Chard Seeds - Ruby Red - Organic - Microgreens SeedsSwiss Chard Seeds - Ruby Red - Organic - Microgreens Seeds
-21%
Heirloom
Organic
Swiss Chard Seeds - Ruby Red - Organic - Microgreens...
Starting at $6.14
Fenugreek Seeds - MicrogreensFenugreek Seeds - Microgreens
-0
Heirloom
Fenugreek Seeds - Microgreens
Starting at $5.05
Nasturtium Seeds - Alaska - Microgreens SeedsNasturtium Seeds - Alaska - Microgreens Seeds
-0
Heirloom
Nasturtium Seeds - Alaska - Microgreens Seeds
Starting at $7.09
Basil Seeds - Sweet (Organic) - MicrogreensBasil Seeds - Sweet (Organic) - Microgreens
-0
Heirloom
Organic
Basil Seeds - Sweet (Organic) - Microgreens
Starting at $9.24
Marigold Microgreens Seeds - Minuta, Ediblemid size pouch type seed packaging for - Marigold Microgreens Minuta Edible
-21%
Heirloom
Marigold Microgreens Seeds - Minuta, Edible
Starting at $2.99
Shungiku (3 Color Daisy) Seeds- MicrogreensShungiku (3 Color Daisy) Seeds- Microgreens
-0
Shungiku (3 Color Daisy) Seeds- Microgreens
Starting at $3.99
Sunflower - Red Storm - Microgreens SeedsSunflower - Red Storm - Microgreens Seeds
-0
Heirloom
Staff Favorite
Sunflower - Red Storm - Microgreens Seeds
Starting at $5.10
Pea - Microgreens Seeds
-0
Pea - Microgreens Seeds
Starting at $4.18
Leek Seeds - Carentan - MicrogreensLeek Seeds - Carentan - Microgreens
-0
Heirloom
Leek Seeds - Carentan - Microgreens
Starting at $5.75
Lupine Seeds - Sweet Lupine - MoonshineLupine Seeds - Sweet Lupine - Moonshine
-0
Lupine Seeds - Sweet Lupine - Moonshine
Starting at $2.99
Chrysanthemum Seeds - Broad Leaf, Edible - MicrogreensChrysanthemum Seeds - Broad Leaf, Edible - Microgreens
-8%
Heirloom
Chrysanthemum Seeds - Broad Leaf, Edible - Microgreens
Starting at $4.99
custom jug packaging for retain pelletscustom bag packaging for retain pellets
-0
Staff Favorite
Retain - Water Retention Soil Additive
Starting at $17.21
Chinese Mahogany Seeds - Microgreenssmall size packet type seed packaging for - Chinese Mahogany Microgreens
-0
Heirloom
Chinese Mahogany Seeds - Microgreens
Starting at $3.99
Pea Seeds - Afila Tendril - Microgreens (Organic)
-0
Heirloom
Organic
Pea Seeds - Afila Tendril - Microgreens (Organic)
Starting at $3.81
Green Mustard Microgreens SeedsGreen Mustard Microgreens Seeds
-12%
Heirloom
Green Mustard Microgreens Seeds
Starting at $4.65
Nasturtium - Whirlybird Mix - Microgreens SeedsNasturtium - Whirlybird Mix - Microgreens Seeds
-0
Heirloom
Nasturtium - Whirlybird Mix - Microgreens Seeds
Starting at $8.49
Sage Herb Seeds - Organic Microgreens SeedsSage Herb Seeds - Organic Microgreens Seeds
-0
Heirloom
Organic
Sage Herb Seeds - Organic Microgreens Seeds
Starting at $21.62
Spinach - Winter Giant - Microgreens SeedsSpinach - Winter Giant - Microgreens Seeds
-0
Heirloom
Spinach - Winter Giant - Microgreens Seeds
Starting at $5.30
contact customer service at 801-491-8700 for instructions helpVermiculite Soil Amendment
-0
Vermiculite Soil Amendment
Starting at $10.80
Minute Soil Grow CubeMinute Soil Plus Cube 3 Pack
-0
Minute Soil+ Cube - Amended Compressed Coco Coir
Starting at $6.99
Salad Burnet Herb Seeds - MicrogreensSalad Burnet Herb Seeds - Microgreens
-0
Heirloom
Salad Burnet Herb Seeds - Microgreens
Starting at $4.26
Amaranth Seeds - All Red Leaf - Microgreens Seedsmid size pouch type seed packaging for - Amaranth All Red Leaf Microgreens
-0
Amaranth Seeds - All Red Leaf - Microgreens Seeds
Starting at $9.76
Borage Seeds (Organic) - Microgreens Seedsmid size pouch type seed packaging for - Tomato Slicing Yellow Perfection Organic
-0
Organic
Borage Seeds (Organic) - Microgreens Seeds
Starting at $5.03
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
Paracress aka Toothache Plant - Microgreens Seedsmid size pouch type seed packaging for - Paracress aka Toothache Plant Microgreens
-0
Heirloom
Staff Favorite
Paracress aka Toothache Plant - Microgreens Seeds
Starting at $49.98
Leek Seeds - Giant Musselburgh - MicrogreensLeek Seeds - Giant Musselburgh - Microgreens
-0
Heirloom
Leek Seeds - Giant Musselburgh - Microgreens
Starting at $5.73
Beet - Detroit Mix (Organic) - Microgreens Seeds
Starting at $12.03
Swiss Chard Seeds - Yellow - Microgreens
Starting at $7.09
Swiss Chard Seeds - Yellow - Organic - Microgreens
Starting at $6.12
Corn Salad Seeds - French - Microgreens
Starting at $6.58
Red Storm Sunflower Seeds - Organic - Microgreens Seeds
Starting at $5.35
[ { "featured_image": "files/perlite-wm_1_1222x1222_0ec1fbb2-971b-46cc-b9b1-c419857199a5.jpg", "secondary_image": "products/perlite-wb-wm_1.jpg", "price": 1060, "handle": "perlite-soil-amendment", "title": "Perlite Soil Amendment", "url": "/products/perlite-soil-amendment", "available": true }, { "featured_image": "products/swiss-chard-ruby-red-microgreens-sus-com-wm.jpg", "secondary_image": "products/swiss-chard-ruby-red-seeds-sus-com-wm.jpg", "price": 614, "handle": "swiss-chard-seeds-ruby-red-organic-microgreens-seeds", "title": "Swiss Chard Seeds - Ruby Red - Organic - Microgreens Seeds", "url": "/products/swiss-chard-seeds-ruby-red-organic-microgreens-seeds", "available": true }, { "featured_image": "products/fenugreek-microgreens-wm_65295438-ac01-4e11-8b2d-ddb30f808251_1.jpg", "secondary_image": "files/fenugreek-seeds-microgreens-Comp.jpg", "price": 505, "handle": "fenugreek-seeds-microgreens", "title": "Fenugreek Seeds - Microgreens", "url": "/products/fenugreek-seeds-microgreens", "available": true }, { "featured_image": "files/Nasturtium_Seeds_-_Alaska_-_Microgreens_Seeds-comp.jpg", "secondary_image": "products/nasturtium-alaska-mix-microgreens-wb-wm-700.jpg", "price": 709, "handle": "nasturtium-seeds-alaska", "title": "Nasturtium Seeds - Alaska - Microgreens Seeds", "url": "/products/nasturtium-seeds-alaska", "available": true }, { "featured_image": "files/Basil-Seeds-Sweet-Organic-Microgreens-comp.jpg", "secondary_image": "files/1685722588_CopyofSustainable-WM-Black_800x800px_1.jpg", "price": 924, "handle": "basil-seeds-sweet-organic-microgreens", "title": "Basil Seeds - Sweet (Organic) - Microgreens", "url": "/products/basil-seeds-sweet-organic-microgreens", "available": true }, { "featured_image": "files/marigold-seeds-minuta-edible-comp.jpg", "secondary_image": "products/SeedPouch_3ff31779-7f90-498e-b98b-18e382d61345.jpg", "price": 299, "handle": "marigold-seeds-minuta-edible", "title": "Marigold Microgreens Seeds - Minuta, Edible", "url": "/products/marigold-seeds-minuta-edible", "available": true }, { "featured_image": "files/shungiku-seeds-comp.jpg", "secondary_image": "files/1679343422_CopyofKItazawa-WM-Green_600x600px_76.jpg", "price": 399, "handle": "shungiku-seeds", "title": "Shungiku (3 Color Daisy) Seeds- Microgreens", "url": "/products/shungiku-seeds", "available": true }, { "featured_image": "files/Beet-Detroit-Mix-Organic--Microgreens-Seeds-comp.jpg", "secondary_image": "products/1675445364_CopyofSustainable-WM-Black_600x600px_61_03709b17-626d-44ae-b995-0e71fc8db0fc.jpg", "price": 1203, "handle": "beet-seeds-detroit-mix-organic-microgreens-seeds", "title": "Beet - Detroit Mix (Organic) - Microgreens Seeds", "url": "/products/beet-seeds-detroit-mix-organic-microgreens-seeds", "available": false }, { "featured_image": "files/sunflower-red-storm-microgreens-seeds-comp.jpg", "secondary_image": "products/seed_pouch_7e1a46bd-a26b-4869-94dd-cd4fbc4ed1a6.jpg", "price": 510, "handle": "sunflower-red-storm-microgreens-seeds", "title": "Sunflower - Red Storm - Microgreens Seeds", "url": "/products/sunflower-red-storm-microgreens-seeds", "available": true }, { "featured_image": "products/Pea-microgreen-wm-comp.jpg", "secondary_image": "", "price": 418, "handle": "pea-microgreens-seeds", "title": "Pea - Microgreens Seeds", "url": "/products/pea-microgreens-seeds", "available": true }, { "featured_image": "files/Leek-Seeds-Carantan-Microgreens-Comp.jpg", "secondary_image": "products/leek-giant-musselburgh-microgreens-wm_06c9363f-5d30-4cd7-a072-dc00ba5ecee7_1.jpg", "price": 575, "handle": "leek-seeds-carentan-microgreens", "title": "Leek Seeds - Carentan - Microgreens", "url": "/products/leek-seeds-carentan-microgreens", "available": true }, { "featured_image": "files/lupine-seeds-sweet-lupine-moonshine-Comp.jpg", "secondary_image": "files/Lupine-Sweet-Lupine-Moonshine-seed_69007090-9528-4dbe-9273-f9eddf1ab903.jpg", "price": 299, "handle": "lupine-seeds-sweet-lupine-moonshine", "title": "Lupine Seeds - Sweet Lupine - Moonshine", "url": "/products/lupine-seeds-sweet-lupine-moonshine", "available": true }, { "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 }, { "featured_image": "files/Swiss-Chard-Seeds-Yellow-Microgreens-comp_0112a5c6-dac3-41fc-b0c0-6817040b1a56.jpg", "secondary_image": "products/chard-swiss-yellow-microgreens-cotyledons-wm-sm.jpg", "price": 709, "handle": "swiss-chard-seeds-yellow-microgreens", "title": "Swiss Chard Seeds - Yellow - Microgreens", "url": "/products/swiss-chard-seeds-yellow-microgreens", "available": false }, { "featured_image": "products/retain-large-and-small-sizes-wm.jpg", "secondary_image": "products/retain-50-lb-wm.jpg", "price": 1721, "handle": "retain", "title": "Retain - Water Retention Soil Additive", "url": "/products/retain", "available": true }, { "featured_image": "files/chinese-mahogany-seeds-comp.jpg", "secondary_image": "products/MVS-generic-packet_d7c64ffd-c27e-4367-8a3f-133ec56e8213.jpg", "price": 399, "handle": "chinese-mahogany-seeds", "title": "Chinese Mahogany Seeds - Microgreens", "url": "/products/chinese-mahogany-seeds", "available": true }, { "featured_image": "files/Pea-Seeds-Afila-Tendril-Microgreens-Organic-comp.jpg", "secondary_image": "", "price": 381, "handle": "pea-seeds-afila-tendril-microgreens-organic", "title": "Pea Seeds - Afila Tendril - Microgreens (Organic)", "url": "/products/pea-seeds-afila-tendril-microgreens-organic", "available": true }, { "featured_image": "files/green-mustard-microgreens-seeds-comp.jpg", "secondary_image": "products/mustard-green-microgreens-mix-cotyledons-wm.jpg", "price": 465, "handle": "green-mustard-microgreens-seeds", "title": "Green Mustard Microgreens Seeds", "url": "/products/green-mustard-microgreens-seeds", "available": true }, { "featured_image": "files/nasturtium-seeds-whirlybird-mix-Comp.jpg", "secondary_image": "products/nasturtium-whirlybird-mix-microgreens-wb-wm-700.jpg", "price": 849, "handle": "nasturtium-seeds-whirlybird-mix", "title": "Nasturtium - Whirlybird Mix - Microgreens Seeds", "url": "/products/nasturtium-seeds-whirlybird-mix", "available": true }, { "featured_image": "files/sage-herb-seeds-organic-microgreens-seeds-comp.jpg", "secondary_image": "products/sage-organic-seeds-sus-com-wm.jpg", "price": 2162, "handle": "sage-herb-seeds-organic-microgreens-seeds", "title": "Sage Herb Seeds - Organic Microgreens Seeds", "url": "/products/sage-herb-seeds-organic-microgreens-seeds", "available": true }, { "featured_image": "files/spinach-winter-giant-microgreens-seeds-Comp.jpg", "secondary_image": "products/Seed_Pouch_1_1_1_1_1_1_6cfd535b-bcb3-496a-bbc3-a55be52c9d88.jpg", "price": 530, "handle": "spinach-winter-giant-microgreens-seeds", "title": "Spinach - Winter Giant - Microgreens Seeds", "url": "/products/spinach-winter-giant-microgreens-seeds", "available": true }, { "featured_image": "files/vermiculite-wm_1_1222x1222_5fcdade9-6048-498c-9448-c46c388725c2.jpg", "secondary_image": "products/vermiculite-wb-wm_1.jpg", "price": 1080, "handle": "vermiculite-soil-amendment", "title": "Vermiculite Soil Amendment", "url": "/products/vermiculite-soil-amendment", "available": true }, { "featured_image": "files/Minute_Soil_Grow_Cube_Comp.jpg", "secondary_image": "files/Minute_Soil_Plus_Cube_3_Pack_Comp.jpg", "price": 699, "handle": "minute-soil-cube-amended-compressed-coco-coir", "title": "Minute Soil+ Cube - Amended Compressed Coco Coir", "url": "/products/minute-soil-cube-amended-compressed-coco-coir", "available": true }, { "featured_image": "files/swiss-chard-seeds-canary-organic-micrgoreens-Comp.jpg", "secondary_image": "products/swiss-chard-yellow-sus-com-wm_7d88a306-9e30-4c31-afba-337d2004ef06.jpg", "price": 612, "handle": "swiss-chard-seeds-canary-organic-micrgoreens", "title": "Swiss Chard Seeds - Yellow - Organic - Microgreens", "url": "/products/swiss-chard-seeds-canary-organic-micrgoreens", "available": false }, { "featured_image": "files/salad-burnet-herb-seeds-microgreens-Comp.jpg", "secondary_image": "products/salad-burnet-microgreens-wb-wm-opt.jpg", "price": 426, "handle": "salad-burnet-herb-seeds-microgreens", "title": "Salad Burnet Herb Seeds - Microgreens", "url": "/products/salad-burnet-herb-seeds-microgreens", "available": true }, { "featured_image": "files/amaranth-seeds-all-red-leaf-microgreens-seeds-comp.jpg", "secondary_image": "files/MVS_1_lb_c188f8fd-b226-4698-aaf7-2bf9f55a7218.jpg", "price": 976, "handle": "amaranth-seeds-all-red-leaf-microgreens-seeds", "title": "Amaranth Seeds - All Red Leaf - Microgreens Seeds", "url": "/products/amaranth-seeds-all-red-leaf-microgreens-seeds", "available": true }, { "featured_image": "files/borage-microgreens-organic-WM-comp.jpg", "secondary_image": "files/Sustainable_1_lb.jpg", "price": 503, "handle": "borage-seeds-organic-microgreens-seeds", "title": "Borage Seeds (Organic) - Microgreens Seeds", "url": "/products/borage-seeds-organic-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/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/paracress-microgreens-seeds-Comp.jpg", "secondary_image": "products/non-gmo-sprouting-seed_b0ccdc15-042e-489c-b0ac-963b42a02919.jpg", "price": 4998, "handle": "paracress-microgreens-seeds", "title": "Paracress aka Toothache Plant - Microgreens Seeds", "url": "/products/paracress-microgreens-seeds", "available": true }, { "featured_image": "files/leek-seeds-giant-musselburgh-microgreens-comp.jpg", "secondary_image": "products/leek-giant-musselburgh-microgreens-wb-wm_1_b869bf40-85e8-409a-aeef-b1df86fb5344.jpg", "price": 573, "handle": "leek-seeds-giant-musselburgh-microgreens", "title": "Leek Seeds - Giant Musselburgh - Microgreens", "url": "/products/leek-seeds-giant-musselburgh-microgreens", "available": true }, { "featured_image": "products/seeds-sunflower-black-mammoth-black-mammoth-sunflower-microgreensr-wm-comp.jpg", "secondary_image": "products/seeds-sunflower-black-mammoth-black-mammoth-sunflower-wm-comp.jpg", "price": 535, "handle": "red-storm-sunflower-seeds-organic-microgreens-seeds", "title": "Red Storm Sunflower Seeds - Organic - Microgreens Seeds", "url": "/products/red-storm-sunflower-seeds-organic-microgreens-seeds", "available": false } ]