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
56 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" }
Peppermint Seedsmid size pouch type seed packaging for - Peppermint
-0
Peppermint Seeds
Starting at $3.39
Lemongrass Seeds - West IndianLemongrass Seeds - West Indian
-0
Heirloom
Lemongrass Seeds - West Indian
Starting at $3.89
Crimson Clover - Cover Crop Seedsmid size pouch type seed packaging for - Crimson Clover Cover Crop
-0
Heirloom
Crimson Clover - Cover Crop Seeds
Starting at $2.99
Lemon Balm Seedsmid size pouch type seed packaging for - Lemon Balm
-0
Heirloom
Lemon Balm Seeds
Starting at $2.99
Spearmint Seeds
-0
Heirloom
Spearmint Seeds
Starting at $2.99
Crimson Clover - Organic - Cover Crop SeedsCrimson Clover - Organic - Cover Crop Seeds
-0
Heirloom
Organic
Crimson Clover - Organic - Cover Crop Seeds
Starting at $3.59
Peppermint Seeds (Organic)
-0
Organic
Peppermint Seeds (Organic)
Starting at $3.59
Impatiens Seeds - Accent SeriesImpatiens Seeds - Accent Series
-0
Impatiens Seeds - Accent Series
Starting at $3.99
Broccoli Seeds - Chinese Broccoli - Kailaanmid size pouch type seed packaging for - Broccoli Chinese Broccoli Kailaan
-0
Heirloom
Broccoli Seeds - Chinese Broccoli - Kailaan
Starting at $3.99
Broccoli Seeds - Chinese Broccoli - Late Jade - Hybridmid size pouch type seed packaging for - Broccoli Chinese Broccoli Late Jade Hybrid
-0
Broccoli Seeds - Chinese Broccoli - Late Jade - Hybrid
Starting at $3.99
Lobelia Seeds - Regatta Series (MSP)Lobelia Seeds - Regatta Series (MSP)
-0
Lobelia Seeds - Regatta Series (MSP)
Starting at $2.99
Lobelia Rosamond Lobelia Rosamond
-0
Lobelia Seeds - Sapphire
Starting at $2.99
Catmint Seeds - Blue Moonmid size pouch type seed packaging for - Catmint Blue Moon
-0
Catmint Seeds - Blue Moon
Starting at $3.69
Hypoestes Seeds - Splash Select SeriesHypoestes Seeds - Splash Select Series
-0
Hypoestes Seeds - Splash Select Series
Starting at $3.39
Chinese Leek Seeds - Floweringmid size pouch type seed packaging for - Chinese Leek Flowering
-0
Heirloom
Chinese Leek Seeds - Flowering
Starting at $3.99
Cauliflower Seeds - Song TJS-65 - Hybridmid size pouch type seed packaging for - Cauliflower Song TJS-65 Hybrid
-0
Cauliflower Seeds - Song TJS-65 - Hybrid
Starting at $3.99
Grass Mix - Cabin Grass Seedmid size pouch type seed packaging for - Grass Mix Cabin Grass
-0
Heirloom
Staff Favorite
Grass Mix - Cabin Grass Seed
Starting at $20.59
Lobelia Seeds - Cambridge Blue
-0
Lobelia Seeds - Cambridge Blue
Starting at $2.63
Amaranthus Seeds - Early Splendormid size pouch type seed packaging for - Amaranthus Early Splendor
-0
Amaranthus Seeds - Early Splendor
Starting at $3.39
Sweet Pea Seeds - High ScentSweet Pea Seeds - High Scent
-0
Sweet Pea Seeds - High Scent
Starting at $3.39
Alternanthera - Purple Knightmid size pouch type seed packaging for - Alternanthera Purple Knight
-0
Alternanthera - Purple Knight
Starting at $4.79
Lobelia Seeds - Vulcan Red (Pelleted)mid size pouch type seed packaging for - Lobelia Vulcan Red Pelleted
-0
Lobelia Seeds - Vulcan Red (Pelleted)
$6.49
Parsley Seeds - Italian Giant (Organic)
Starting at $3.59
Spinach Seeds - Red Malabar
$3.99
Parsley Seeds - Italian Giant
Starting at $2.99
Ageratum Seeds - Blue Horizon (Pelleted)
Starting at $4.28
Kale Seeds - Garden Blend
Starting at $2.99
Parsley Seeds - Double Curled
Starting at $2.99
Calendula Seeds - Fiesta Gitana
Starting at $3.29
Burdock Seeds - Ha Gobo
Starting at $3.99
Ageratum Seeds - Dwarf Blue Mink
Starting at $2.99
Parsley Seeds - Kitchen Garden Blend (Organic)
Starting at $3.59
[ { "featured_image": "files/Peppermint-Seeds-comp.jpg", "secondary_image": "products/SeedPouch_dd6490a7-5150-4c4d-964a-15be6c330286.jpg", "price": 339, "handle": "peppermint", "title": "Peppermint Seeds", "url": "/products/peppermint", "available": true }, { "featured_image": "files/Lemon-Grass_fb4acccc-2f81-4d34-95b3-9fbd3f01a84b.jpg", "secondary_image": "products/lemon-grass-package-wm.jpg", "price": 389, "handle": "lemongrass", "title": "Lemongrass Seeds - West Indian", "url": "/products/lemongrass", "available": true }, { "featured_image": "files/Crimson_Clover_comp_51cfcc4d-b2b5-474e-a032-d5e6ffd83c66.jpg", "secondary_image": "products/non-gmo-seed-bag-sm_8c6f3081-9c85-4e95-811e-a7ba81f2dfa8.png", "price": 299, "handle": "crimson-clover-seeds-pelleted", "title": "Crimson Clover - Cover Crop Seeds", "url": "/products/crimson-clover-seeds-pelleted", "available": true }, { "featured_image": "files/Lemon-Balm-Seeds-comp.jpg", "secondary_image": "products/SeedPouch_59431437-7ab5-4107-ae39-96539d5e8263.jpg", "price": 299, "handle": "lemon-balm-seeds", "title": "Lemon Balm Seeds", "url": "/products/lemon-balm-seeds", "available": true }, { "featured_image": "files/spearmint-seeds-comp.jpg", "secondary_image": "", "price": 299, "handle": "spearmint-seeds", "title": "Spearmint Seeds", "url": "/products/spearmint-seeds", "available": true }, { "featured_image": "files/Crimson-Clover-Organic_d6f3662b-27d7-4822-84d8-fa87633ea6cc.jpg", "secondary_image": "files/1678470678_CopyofSustainable-WM-Black_600x600px_84.jpg", "price": 359, "handle": "crimson-clover-seeds-organic", "title": "Crimson Clover - Organic - Cover Crop Seeds", "url": "/products/crimson-clover-seeds-organic", "available": true }, { "featured_image": "files/1685978005_CopyofSustainable-WM-white_800x800px_5_1222x1222_415cab13-fda9-42e4-80d1-b216f8f06ad4.jpg", "secondary_image": "", "price": 359, "handle": "peppermint-seeds-organic", "title": "Peppermint Seeds (Organic)", "url": "/products/peppermint-seeds-organic", "available": true }, { "featured_image": "files/impatiens-accent-series-flower-seed-comp.jpg", "secondary_image": "products/impatiens-accent-deep-pink-flower-wm_700.jpg", "price": 399, "handle": "impatiens-accent-series-flower-seed", "title": "Impatiens Seeds - Accent Series", "url": "/products/impatiens-accent-series-flower-seed", "available": true }, { "featured_image": "files/certified-organic-heirloom-vegetable-seeds-organic-herb-seeds-organic-giant-italian-parsley-comp.jpg", "secondary_image": "products/SSC-organic-generic-packet-com_49fc660b-c973-4cfa-b28e-ab913ac2e393.jpg", "price": 359, "handle": "certified-organic-heirloom-vegetable-seeds-organic-herb-seeds-organic-giant-italian-parsley", "title": "Parsley Seeds - Italian Giant (Organic)", "url": "/products/certified-organic-heirloom-vegetable-seeds-organic-herb-seeds-organic-giant-italian-parsley", "available": false }, { "featured_image": "files/Spinach-Seeds-Red-Malabar-Spinach-comp.jpg", "secondary_image": "", "price": 399, "handle": "spinach-seeds-red-malabar-spinach", "title": "Spinach Seeds - Red Malabar", "url": "/products/spinach-seeds-red-malabar-spinach", "available": false }, { "featured_image": "files/parsley-seeds-italian-giant-comp.jpg", "secondary_image": "products/MVS-generic-packet-com_71626f6a-c01c-4e40-91ea-6a097567457f.jpg", "price": 299, "handle": "parsley-seeds-italian-giant", "title": "Parsley Seeds - Italian Giant", "url": "/products/parsley-seeds-italian-giant", "available": false }, { "featured_image": "files/broccoli-seeds-chinese-broccoli-kailaan-comp.jpg", "secondary_image": "products/non-gmo-seed-bag-premium_79490380-3448-4049-9c36-63e64986d447.png", "price": 399, "handle": "broccoli-seeds-chinese-broccoli-kailaan", "title": "Broccoli Seeds - Chinese Broccoli - Kailaan", "url": "/products/broccoli-seeds-chinese-broccoli-kailaan", "available": true }, { "featured_image": "files/broccoli-seeds-chinese-broccoli-late-jade-hybrid-Comp.jpg", "secondary_image": "products/non-gmo-seed-bag-premium_bf385923-ce15-4c71-b219-2002155b211e.png", "price": 399, "handle": "broccoli-seeds-chinese-broccoli-late-jade-hybrid", "title": "Broccoli Seeds - Chinese Broccoli - Late Jade - Hybrid", "url": "/products/broccoli-seeds-chinese-broccoli-late-jade-hybrid", "available": true }, { "featured_image": "files/lobelia-regatta-series-rose-flower-seeds-comp.png", "secondary_image": "files/Regatta-Series-Mix-Lobelia-wm-comp_e0a05980-724f-418f-9f0d-d2d6f43b1e9c.jpg", "price": 299, "handle": "lobelia-regatta-series-rose-flower-seeds", "title": "Lobelia Seeds - Regatta Series (MSP)", "url": "/products/lobelia-regatta-series-rose-flower-seeds", "available": true }, { "featured_image": "files/Lobelia_Rosamond_Comp.jpg", "secondary_image": "files/Lobelia_Rosamond_Close_Up_Comp.jpg", "price": 299, "handle": "lobelia-sapphire-flower-seeds", "title": "Lobelia Seeds - Sapphire", "url": "/products/lobelia-sapphire-flower-seeds", "available": true }, { "featured_image": "files/cat-mint-seeds-blue-moon-Comp.jpg", "secondary_image": "products/non-gmo-seed-bag-1-oz-sm_e507f623-85ae-4684-83e6-4eeb8bdcf99b.png", "price": 369, "handle": "cat-mint-seeds-blue-moon", "title": "Catmint Seeds - Blue Moon", "url": "/products/cat-mint-seeds-blue-moon", "available": true }, { "featured_image": "files/hypoestes-splash-select-series-flower-seed-comp.jpg", "secondary_image": "products/hypoestes-splash-select-series-mix-flower-wm_700.jpg", "price": 339, "handle": "hypoestes-splash-select-series-flower-seed", "title": "Hypoestes Seeds - Splash Select Series", "url": "/products/hypoestes-splash-select-series-flower-seed", "available": true }, { "featured_image": "files/chinese-leek-seeds-flowering-Comp.jpg", "secondary_image": "products/non-gmo-seed-bag-premium_572dac86-706e-444a-ab86-11bbd59e7cce.png", "price": 399, "handle": "chinese-leek-seeds-flowering", "title": "Chinese Leek Seeds - Flowering", "url": "/products/chinese-leek-seeds-flowering", "available": true }, { "featured_image": "files/ageratum-blue-horizon-flower-seeds-Comp.jpg", "secondary_image": "", "price": 428, "handle": "ageratum-blue-horizon-flower-seeds", "title": "Ageratum Seeds - Blue Horizon (Pelleted)", "url": "/products/ageratum-blue-horizon-flower-seeds", "available": false }, { "featured_image": "files/kale-seeds-garden-blend-Comp.jpg", "secondary_image": "products/MVS-generic-packet-com_c5aaf06b-cb82-41ab-86fc-530595f76b2d.jpg", "price": 299, "handle": "kale-seeds-garden-blend", "title": "Kale Seeds - Garden Blend", "url": "/products/kale-seeds-garden-blend", "available": false }, { "featured_image": "files/cauliflower-seeds-song-tjs-65-hybrid-Comp.jpg", "secondary_image": "products/non-gmo-seed-bag-premium_f8f4268e-7470-47b1-ba33-f8c8a24bc9f4.png", "price": 399, "handle": "cauliflower-seeds-song-tjs-65-hybrid", "title": "Cauliflower Seeds - Song TJS-65 - Hybrid", "url": "/products/cauliflower-seeds-song-tjs-65-hybrid", "available": true }, { "featured_image": "files/parsley-seeds-double-curled-Comp.jpg", "secondary_image": "products/MVS-generic-packet-com_f9610fbb-1c84-4ed1-a187-7c706bf02c2a.jpg", "price": 299, "handle": "parsley-seeds-double-curled", "title": "Parsley Seeds - Double Curled", "url": "/products/parsley-seeds-double-curled", "available": false }, { "featured_image": "files/grass-blend-cabin-grass-seed-mix-comp.jpg", "secondary_image": "products/non-gmo-seed-bag-sm_3e92fa42-d030-4ac5-8135-de5bfeb7b798.png", "price": 2059, "handle": "grass-blend-cabin-grass-seed-mix", "title": "Grass Mix - Cabin Grass Seed", "url": "/products/grass-blend-cabin-grass-seed-mix", "available": true }, { "featured_image": "files/lobelia-seeds-cambridge-blue-comp.jpg", "secondary_image": "", "price": 263, "handle": "lobelia-seeds-cambridge-blue", "title": "Lobelia Seeds - Cambridge Blue", "url": "/products/lobelia-seeds-cambridge-blue", "available": true }, { "featured_image": "files/calendula-seeds-fiesta-gitana-Comp.jpg", "secondary_image": "files/Flower_1lb_04399452-1ac3-43f5-ba7e-669e8e420831.jpg", "price": 329, "handle": "calendula-seeds-fiesta-gitana", "title": "Calendula Seeds - Fiesta Gitana", "url": "/products/calendula-seeds-fiesta-gitana", "available": false }, { "featured_image": "files/burdock-seeds-ha-gobo-comp.jpg", "secondary_image": "products/non-gmo-seed-bag-premium_d0a1a4ef-ed30-4127-8ae9-d38ca63d148a.png", "price": 399, "handle": "burdock-seeds-ha-gobo", "title": "Burdock Seeds - Ha Gobo", "url": "/products/burdock-seeds-ha-gobo", "available": false }, { "featured_image": "files/ageratum-seeds-dwarf-blue-mink-Comp.jpg", "secondary_image": "files/Flower_1lb_3ee6d4dd-4b43-48ff-92e6-e3ed68d7cf82.jpg", "price": 299, "handle": "ageratum-seeds-dwarf-blue-mink", "title": "Ageratum Seeds - Dwarf Blue Mink", "url": "/products/ageratum-seeds-dwarf-blue-mink", "available": false }, { "featured_image": "files/amaranthus-early-splendor-flower-seeds-comp.jpg", "secondary_image": "products/non-gmo-seed-bag-1-oz-sm_d16b2aad-f699-4084-9f6a-44fdae19e73d.png", "price": 339, "handle": "amaranth-early-splendor-flower-seeds", "title": "Amaranthus Seeds - Early Splendor", "url": "/products/amaranth-early-splendor-flower-seeds", "available": true }, { "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/alternanthera-purple-knight-flower-seed-Comp.jpg", "secondary_image": "products/non-gmo-seed-bag-1-oz-sm_b2d76ad6-f6e3-44c1-a1e7-40b06c7a575c.png", "price": 479, "handle": "alternanthera-purple-knight-flower-seed", "title": "Alternanthera - Purple Knight", "url": "/products/alternanthera-purple-knight-flower-seed", "available": true }, { "featured_image": "files/parsley-kitchen-garden-blend-organic-l-com-wm_1222x1222_01b07fe0-3ef6-40ec-96f4-9f18dbbaa381.jpg", "secondary_image": "products/SSC-organic-generic-packet-com_8c79969f-6f47-4e2e-bcc5-febd906991ad.jpg", "price": 359, "handle": "parsley-seeds-kitchen-garden-blend-organic", "title": "Parsley Seeds - Kitchen Garden Blend (Organic)", "url": "/products/parsley-seeds-kitchen-garden-blend-organic", "available": false }, { "featured_image": "files/lobelia-vulcan-red-seeds-Comp.jpg", "secondary_image": "products/non-gmo-sprouting-seed_e2c3c396-d85c-4312-8669-283eece886e6.jpg", "price": 649, "handle": "lobelia-vulcan-red-seeds", "title": "Lobelia Seeds - Vulcan Red (Pelleted)", "url": "/products/lobelia-vulcan-red-seeds", "available": true } ]