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
3657 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" }
Watermelon Seeds - Picnic - Tendersweet Orangesmall size packet type seed packaging for - Watermelon Picnic Tendersweet Orange
-31%
Heirloom
Watermelon Seeds - Picnic - Tendersweet Orange
Starting at $1.99
Squash Seeds - Summer - Early Prolific Straightneck (Organic)small size packet type seed packaging for - Squash Summer Early Prolific Straightneck Organic
-0
AAS Winner
Heirloom
Organic
Squash Seeds - Summer - Early Prolific Straightneck (Organic)
Starting at $3.59
Digitalis (Foxglove) Seeds - Mixed Colormid size pouch type seed packaging for - Digitalis Foxglove Mixed Color
-0
Digitalis (Foxglove) Seeds - Mixed Color
Starting at $2.99
Alyssum Seeds - Royal Carpetmid size pouch type seed packaging for - Alyssum Royal Carpet
-0
Alyssum Seeds - Royal Carpet
Starting at $2.99
Shasta Daisy Seeds - Alaskamid size pouch type seed packaging for - Shasta Daisy Alaska
-0
Shasta Daisy Seeds - Alaska
Starting at $2.99
All Perennial Flower Seeds MixAll Perennial Flower Seeds Mix
-0
All Perennial Flower Seeds Mix
Starting at $3.99
Echinacea Seeds - Cheyenne Spiritmid size pouch type seed packaging for - Echinacea Cheyenne Spirit
-0
AAS Winner
Echinacea Seeds - Cheyenne Spirit
Starting at $6.79
Cosmos Seeds - Bright Lightsmid size pouch type seed packaging for - Cosmos Bright Lights
-0
Cosmos Seeds - Bright Lights
Starting at $2.99
Pepper Seeds - Sweet - Gypsy HybridPepper Seeds - Sweet - Gypsy Hybrid
-0
AAS Winner
Pepper Seeds - Sweet - Gypsy Hybrid
Starting at $3.69
Squash Seeds - Winter - Blue Hubbardmid size pouch type seed packaging for - Squash Winter Blue Hubbard
-0
Heirloom
Squash Seeds - Winter - Blue Hubbard
Starting at $2.99
Mustard Seeds - Red Giant (Organic)small size packet type seed packaging for - Mustard Red Giant Organic
-0
Heirloom
Organic
Mustard Seeds - Red Giant (Organic)
Starting at $3.59
Lettuce Seeds - Jerichosmall size packet type seed packaging for - Lettuce Jericho
-0
Heirloom
Lettuce Seeds - Jericho
Starting at $2.99
Mustard - Mizuna Red Leaf - Microgreens SeedsMustard - Mizuna Red Leaf - Microgreens Seeds
-0
Heirloom
Mustard - Mizuna Red Leaf - Microgreens Seeds
Starting at $8.32
Cauliflower Seeds - Self-Blanchesmall size packet type seed packaging for - Cauliflower Self-Blanche
-0
Heirloom
Cauliflower Seeds - Self-Blanche
Starting at $2.99
Mustard Seeds - Tatsoi
-0
Heirloom
Mustard Seeds - Tatsoi
Starting at $3.99
Eggplant Seeds - Long Purplemid size pouch type seed packaging for - Eggplant Long Purple
-0
Heirloom
Eggplant Seeds - Long Purple
Starting at $2.99
Onion Seeds - Short - Yellow Granex PRR HybridOnion Seeds - Short - Yellow Granex PRR Hybrid
-0
Onion Seeds - Short - Yellow Granex PRR Hybrid
Starting at $3.99
Zinnia Seeds - State Fair Mixmid size pouch type seed packaging for - Zinnia State Fair Mix
-0
Zinnia Seeds - State Fair Mix
Starting at $3.39
Soft White Wheat (Organic) - Bulk Grains & FoodsSoft White Wheat (Organic) - Bulk Grains & Foods
-0
Organic
Soft White Wheat (Organic) - Bulk Grains & Foods
Starting at $8.84
Zinnia Seeds - Thumbelina Mixturemid size pouch type seed packaging for - Zinnia Thumbelina Mixture
-0
AAS Winner
Zinnia Seeds - Thumbelina Mixture
Starting at $2.99
Squash Seeds - Winter - Table King Bush Acornmid size pouch type seed packaging for - Squash Winter Table King Bush Acorn
-0
AAS Winner
Heirloom
Squash Seeds - Winter - Table King Bush Acorn
Starting at $2.99
Bean Seeds - Bush - Aquadulce Favamid size pouch type seed packaging for - Bean Bush Aquadulce Fava
-0
Heirloom
Bean Seeds - Bush - Aquadulce Fava
Starting at $5.11
Mustard - Spinach (Komatsuna) - Microgreens SeedsMustard - Spinach (Komatsuna) - Microgreens Seeds
-0
Heirloom
Mustard - Spinach (Komatsuna) - Microgreens Seeds
Starting at $7.74
Plantain Seeds - Bostonsmall size packet type seed packaging for - Plantain Boston
-0
Heirloom
Plantain Seeds - Boston
Starting at $2.99
Coleus Seeds - Rainbow Mixturemid size pouch type seed packaging for - Coleus Rainbow Mixture
-0
Coleus Seeds - Rainbow Mixture
Starting at $2.99
Squash Seeds - Winter - Japanese Red Kuri (Uchiki Kuri)Squash Seeds - Winter - Japanese Red Kuri (Uchiki Kuri)
-0
Heirloom
Squash Seeds - Winter - Japanese Red Kuri (Uchiki Kuri)
Starting at $3.99
Tomato Seeds - Slicing - Heirloom Rainbow Blend (Organic)mid size pouch type seed packaging for - Tomato Slicing Heirloom Rainbow Blend Organic
-0
Heirloom
Organic
Tomato Seeds - Slicing - Heirloom Rainbow Blend (Organic)
Starting at $3.59
Eggplant Seeds - Fairy Tale Hybridmid size pouch type seed packaging for - Eggplant Fairy Tale Hybrid
-0
AAS Winner
Eggplant Seeds - Fairy Tale Hybrid
Starting at $4.09
Milk Thistle Seedssmall size packet type seed packaging for - Milk Thistle
-0
Heirloom
Milk Thistle Seeds
Starting at $2.99
Lettuce Seeds - Leaf - Lollo Rossomid size pouch type seed packaging for - Lettuce Leaf Lollo Rosso
-0
Heirloom
Lettuce Seeds - Leaf - Lollo Rosso
Starting at $2.99
Lettuce - Microgreens SeedsLettuce - Microgreens Seeds
-0
Heirloom
Lettuce - Microgreens Seeds
Starting at $5.80
Cucumber Seeds - Armenian Striped
Starting at $2.99
[ { "featured_image": "files/tendersweet-orange-watermelon-seed-Comp.jpg", "secondary_image": "products/Seed_Packet_444c390f-8f6f-4fed-8367-98ca7d43b354.jpg", "price": 199, "handle": "tendersweet-orange-watermelon-seed", "title": "Watermelon Seeds - Picnic - Tendersweet Orange", "url": "/products/tendersweet-orange-watermelon-seed", "available": true }, { "featured_image": "files/organic-early-prolific-straightneck-squash-comp.jpg", "secondary_image": "products/SSC-organic-generic-packet-com_d69953eb-24c7-4d9a-9d0f-a3399e9dbad5.jpg", "price": 359, "handle": "organic-early-prolific-straightneck-squash", "title": "Squash Seeds - Summer - Early Prolific Straightneck (Organic)", "url": "/products/organic-early-prolific-straightneck-squash", "available": true }, { "featured_image": "files/digitalis-foxglove-mixed-seed-wm_700_1222x1222_f124cff4-260a-435d-a204-8cc73a89f425.jpg", "secondary_image": "products/non-gmo-seed-bag-4-oz-sm_e33d6d42-9a19-44a3-b6ae-a401073fa3e8.png", "price": 299, "handle": "digitalis-foxglove-mixed-color-flower-seeds", "title": "Digitalis (Foxglove) Seeds - Mixed Color", "url": "/products/digitalis-foxglove-mixed-color-flower-seeds", "available": true }, { "featured_image": "files/alyssum-royal-carpet-seed-wm_700_1222x1222_27e3c9c1-2abb-4024-a3ab-7e47dd054a86.jpg", "secondary_image": "products/non-gmo-seed-bag-1-oz-sm_2b82e41c-26e4-43db-a51b-f10fff44ecd0.png", "price": 299, "handle": "alyssum-royal-carpet-flower-seeds", "title": "Alyssum Seeds - Royal Carpet", "url": "/products/alyssum-royal-carpet-flower-seeds", "available": true }, { "featured_image": "files/shasta-daisy-alaska-seeds-flower-seeds-Comp.jpg", "secondary_image": "products/SeedPouch_68bb3259-6c74-4e67-a16c-e2d9fcb0647a.jpg", "price": 299, "handle": "shasta-daisy-alaska-seeds-flower-seeds", "title": "Shasta Daisy Seeds - Alaska", "url": "/products/shasta-daisy-alaska-seeds-flower-seeds", "available": true }, { "featured_image": "files/flower-seed-wildflower-mixes-all-perennial-mix-comp.jpg", "secondary_image": "products/all-perennial-wildflower-mix-com-wm.jpg", "price": 399, "handle": "flower-seed-wildflower-mixes-all-perennial-mix", "title": "All Perennial Flower Seeds Mix", "url": "/products/flower-seed-wildflower-mixes-all-perennial-mix", "available": true }, { "featured_image": "files/echinacea-cheyenne-spirit-flower-seeds-comp.jpg", "secondary_image": "products/non-gmo-seed-bag-1-oz-sm_f18bfc3b-bd6f-44fd-956d-85e941220df8.png", "price": 679, "handle": "echinacea-cheyenne-spirit-flower-seeds", "title": "Echinacea Seeds - Cheyenne Spirit", "url": "/products/echinacea-cheyenne-spirit-flower-seeds", "available": true }, { "featured_image": "files/cosmos-bright-lights-flower-seeds-Comp.jpg", "secondary_image": "products/non-gmo-seed-bag-sm_60a5ccdf-9c53-447d-aa22-befeecdfc8e7.png", "price": 299, "handle": "cosmos-bright-lights-flower-seeds", "title": "Cosmos Seeds - Bright Lights", "url": "/products/cosmos-bright-lights-flower-seeds", "available": true }, { "featured_image": "files/pepper-sweet-gypsy-hybrid-seeds-comp.jpg", "secondary_image": "products/Seed_Pouch_1_24657420-7c4c-471f-a9c3-35925f8e5446.jpg", "price": 369, "handle": "pepper-sweet-gypsy-hybrid-seeds", "title": "Pepper Seeds - Sweet - Gypsy Hybrid", "url": "/products/pepper-sweet-gypsy-hybrid-seeds", "available": true }, { "featured_image": "files/squash-winter-blue-hubbard-seeds-Comp.jpg", "secondary_image": "products/non-gmo-sprouting-seed_32a6160b-196f-4979-a99c-125b88eecdcd.jpg", "price": 299, "handle": "squash-winter-blue-hubbard-seeds", "title": "Squash Seeds - Winter - Blue Hubbard", "url": "/products/squash-winter-blue-hubbard-seeds", "available": true }, { "featured_image": "files/mustard-red-giant-organic-seeds-Comp.jpg", "secondary_image": "products/SSC-organic-generic-packet-com_4d2915a2-118c-42da-81f9-2e831b92862f.jpg", "price": 359, "handle": "mustard-red-giant-organic-seeds", "title": "Mustard Seeds - Red Giant (Organic)", "url": "/products/mustard-red-giant-organic-seeds", "available": true }, { "featured_image": "files/jericho-lettuce-seeds-comp.jpg", "secondary_image": "products/Seed_Packet_ba7eeb32-7a8e-4965-b509-dd2883f3289e.jpg", "price": 299, "handle": "jericho-lettuce-seeds", "title": "Lettuce Seeds - Jericho", "url": "/products/jericho-lettuce-seeds", "available": true }, { "featured_image": "files/Mustard-Mizuna-Red-Leaf-Microgreens-Seeds-Comp.jpg", "secondary_image": "products/1674509627_CopyofKItazawa-WM-Green_600x600px_42_5243e54b-8dd2-4611-9cf4-3250a331a9c2.jpg", "price": 832, "handle": "mustard-mizuna-red-leaf-microgreens-seeds", "title": "Mustard - Mizuna Red Leaf - Microgreens Seeds", "url": "/products/mustard-mizuna-red-leaf-microgreens-seeds", "available": true }, { "featured_image": "files/cauliflower-self-blanche-comp.jpg", "secondary_image": "products/MVS-generic-packet_04685bc6-ed8c-4239-9971-a11ca2e36553.jpg", "price": 299, "handle": "cauliflower-self-blanche", "title": "Cauliflower Seeds - Self-Blanche", "url": "/products/cauliflower-self-blanche", "available": true }, { "featured_image": "files/Mustard_Tatsoi_Comp.jpg", "secondary_image": "", "price": 399, "handle": "mustard-tatsoi-seeds", "title": "Mustard Seeds - Tatsoi", "url": "/products/mustard-tatsoi-seeds", "available": true }, { "featured_image": "files/cucumber-seeds-armenian-striped-Comp.jpg", "secondary_image": "products/MVS-generic-packet-com_0b616f0c-0415-4637-a6f6-8f014b6b515d.jpg", "price": 299, "handle": "cucumber-seeds-armenian-striped", "title": "Cucumber Seeds - Armenian Striped", "url": "/products/cucumber-seeds-armenian-striped", "available": false }, { "featured_image": "files/eggplant-long-purple-comp.jpg", "secondary_image": "products/non-gmo-seed-bag-sm_9130c7b6-7270-45bb-950b-61040d3ee8d3.png", "price": 299, "handle": "eggplant-long-purple", "title": "Eggplant Seeds - Long Purple", "url": "/products/eggplant-long-purple", "available": true }, { "featured_image": "files/onion-seeds-hybrid-yellow-granex-prr-f1-comp.jpg", "secondary_image": "products/Seed_Pouch_1_ecba499e-3058-4869-a99b-9212bd22725d.jpg", "price": 399, "handle": "onion-seeds-hybrid-yellow-granex-prr-f1", "title": "Onion Seeds - Short - Yellow Granex PRR Hybrid", "url": "/products/onion-seeds-hybrid-yellow-granex-prr-f1", "available": true }, { "featured_image": "files/zinnia-state-fair-mix-flower-seed-comp.jpg", "secondary_image": "products/non-gmo-sprouting-seed_079ee3c1-e2ea-4086-944f-ff6d50506058.jpg", "price": 339, "handle": "zinnia-state-fair-mix-flower-seed", "title": "Zinnia Seeds - State Fair Mix", "url": "/products/zinnia-state-fair-mix-flower-seed", "available": true }, { "featured_image": "products/wheat-soft-white-grain-bulk-wm_700.jpg", "secondary_image": "products/soft-white-wheat-16-oz-bag-seed-wm_700.jpg", "price": 884, "handle": "soft-white-wheat-organic-bulk-grains-foods", "title": "Soft White Wheat (Organic) - Bulk Grains & Foods", "url": "/products/soft-white-wheat-organic-bulk-grains-foods", "available": true }, { "featured_image": "files/zinnia-thumbelina-mixture-flower-seed-comp.jpg", "secondary_image": "products/SeedPouch_312c84e1-434b-424c-8ce6-1ebca1e908a2.jpg", "price": 299, "handle": "zinnia-thumbelina-mixture-flower-seed", "title": "Zinnia Seeds - Thumbelina Mixture", "url": "/products/zinnia-thumbelina-mixture-flower-seed", "available": true }, { "featured_image": "files/squash-winter-table-king-bush-acorn-seeds-comp.jpg", "secondary_image": "products/non-gmo-seed-bag-1-oz-sm_1_1_bac23bf7-3575-4b52-8661-e0417fe9cb96.png", "price": 299, "handle": "squash-winter-table-king-bush-acorn-seeds", "title": "Squash Seeds - Winter - Table King Bush Acorn", "url": "/products/squash-winter-table-king-bush-acorn-seeds", "available": true }, { "featured_image": "files/bean-seeds-fava-aquadulce-comp.jpg", "secondary_image": "products/non-gmo-seed-bag-sm_3efd82e5-4c3d-43b7-9b3b-326ce1830d0c.png", "price": 511, "handle": "bean-seeds-fava-aquadulce", "title": "Bean Seeds - Bush - Aquadulce Fava", "url": "/products/bean-seeds-fava-aquadulce", "available": true }, { "featured_image": "files/Mustard-Spinach-Komatsuna-Microgreens-Seeds-comp.jpg", "secondary_image": "products/1674067552_CopyofKitazawa-WM-White_600x600px_16.jpg", "price": 774, "handle": "mustard-spinach-komatsuna-microgreens-seeds", "title": "Mustard - Spinach (Komatsuna) - Microgreens Seeds", "url": "/products/mustard-spinach-komatsuna-microgreens-seeds", "available": true }, { "featured_image": "files/plantain-boston-Comp_1.jpg", "secondary_image": "products/Seed_Packet_40ffb4cc-b753-491e-b2e8-7a4aeac64398.jpg", "price": 299, "handle": "plantain-boston", "title": "Plantain Seeds - Boston", "url": "/products/plantain-boston", "available": true }, { "featured_image": "files/coleus-rainbow-mixture-flower-seed-comp.jpg", "secondary_image": "products/non-gmo-seed-bag-sm_c1fe8efd-41e9-4535-a523-28938c805f12.png", "price": 299, "handle": "coleus-rainbow-mixture-flower-seed", "title": "Coleus Seeds - Rainbow Mixture", "url": "/products/coleus-rainbow-mixture-flower-seed", "available": true }, { "featured_image": "files/japanese_red_kuri_squash_wm.jpg", "secondary_image": "files/KZ_1_lb.jpg", "price": 399, "handle": "japanese-red-kuri-squash", "title": "Squash Seeds - Winter - Japanese Red Kuri (Uchiki Kuri)", "url": "/products/japanese-red-kuri-squash", "available": true }, { "featured_image": "files/tomato-seeds-heirloom-blend-organic-Comp.jpg", "secondary_image": "products/non-gmo-seed-bag-1-lb-com_e6bb42e5-5a55-4eef-84c3-a25dbc34c059.jpg", "price": 359, "handle": "tomato-seeds-heirloom-blend-organic", "title": "Tomato Seeds - Slicing - Heirloom Rainbow Blend (Organic)", "url": "/products/tomato-seeds-heirloom-blend-organic", "available": true }, { "featured_image": "files/eggplant-fairy-tale-hybrid-comp.jpg", "secondary_image": "products/non-gmo-seed-bag-1-oz-sm_a317d12d-d640-4b22-aa17-6d2059b4c7de.png", "price": 409, "handle": "eggplant-fairy-tale-hybrid", "title": "Eggplant Seeds - Fairy Tale Hybrid", "url": "/products/eggplant-fairy-tale-hybrid", "available": true }, { "featured_image": "files/milk-thistle-comp.jpg", "secondary_image": "products/Seed_Packet_5149e916-57d4-41c0-af72-8339e03dfe96.jpg", "price": 299, "handle": "milk-thistle", "title": "Milk Thistle Seeds", "url": "/products/milk-thistle", "available": true }, { "featured_image": "files/lettuce-leaf-lolla-rossa-seeds-Comp.jpg", "secondary_image": "products/non-gmo-sprouting-seed_aa017579-0f4b-4331-adfe-594741647dc4.jpg", "price": 299, "handle": "lettuce-leaf-lolla-rossa-seeds", "title": "Lettuce Seeds - Leaf - Lollo Rosso", "url": "/products/lettuce-leaf-lolla-rossa-seeds", "available": true }, { "featured_image": "files/lettuce-microgreens-seeds-comp.jpg", "secondary_image": "products/lettuce-microgreens-mix-wm.jpg", "price": 580, "handle": "lettuce-microgreens-seeds", "title": "Lettuce - Microgreens Seeds", "url": "/products/lettuce-microgreens-seeds", "available": true } ]