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
504 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" }
Radicchio Seeds - Palla Rosamid size pouch type seed packaging for - Radicchio Palla Rosa
-0
Heirloom
Radicchio Seeds - Palla Rosa
Starting at $2.99
African Marigold Seeds - Inca II SeriesAfrican Marigold Seeds - Inca II Series
-0
Staff Favorite
African Marigold Seeds - Inca II Series
Starting at $4.79
Verbena Seeds - Quartz XP SeriesVerbena Seeds - Quartz XP Series
-0
Verbena Seeds - Quartz XP Series
Starting at $4.69
Tomato Seeds - Slicing - Pineapplemid size pouch type seed packaging for - Zinnia Magellan Series Orange
-0
Heirloom
Tomato Seeds - Slicing - Pineapple
Starting at $3.79
Okra Seeds - Red Burgundysmall size packet type seed packaging for - Okra Red Burgundy
-0
Heirloom
Okra Seeds - Red Burgundy
Starting at $2.99
Watermelon Seeds - Mini - Sugar Baby (Organic)small size packet type seed packaging for - Watermelon Mini Sugar Baby Organic
-0
Heirloom
Organic
Watermelon Seeds - Mini - Sugar Baby (Organic)
Starting at $3.59
Tomato Seeds - Cherry - Gardener's Delightmid size pouch type seed packaging for - Tomato Cherry Gardeners Delight
-0
Heirloom
Tomato Seeds - Cherry - Gardener's Delight
Starting at $3.29
Watermelon Seeds - Picnic - Striped Klondike Blue RibbonWatermelon Seeds - Picnic - Striped Klondike Blue Ribbon
-0
Heirloom
Watermelon Seeds - Picnic - Striped Klondike Blue Ribbon
Starting at $2.99
Echinacea Seeds - Magnusmid size pouch type seed packaging for - Echinacea Magnus
-0
Echinacea Seeds - Magnus
Starting at $2.99
Bachelors Buttons Seeds - Mixed Colorsmid size pouch type seed packaging for - Bachelors Buttons Mixed Colors
-0
Bachelors Buttons Seeds - Mixed Colors
Starting at $2.99
Broccoli Seeds - Destiny Hybridmid size pouch type seed packaging for - Broccoli Destiny Hybrid
-0
Broccoli Seeds - Destiny Hybrid
Starting at $3.99
Coleus Seeds - Wizard Series (Pelleted)Coleus Seeds - Wizard Series (Pelleted)
-0
Coleus Seeds - Wizard Series (Pelleted)
Starting at $3.39
Echinacea Seeds - Cheyenne Spiritmid size pouch type seed packaging for - Echinacea Cheyenne Spirit
-0
AAS Winner
Echinacea Seeds - Cheyenne Spirit
Starting at $6.79
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
Coleus Seeds - Rainbow Mixturemid size pouch type seed packaging for - Coleus Rainbow Mixture
-0
Coleus Seeds - Rainbow Mixture
Starting at $2.99
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
Tomato Seeds - Paste - Rio Grandemid size pouch type seed packaging for - Tomato Paste Rio Grande
-0
Heirloom
Tomato Seeds - Paste - Rio Grande
Starting at $2.99
Hibiscus Seeds - Luna SeriesHibiscus Seeds - Luna Series
-0
Hibiscus Seeds - Luna Series
Starting at $15.36
Echinacea Seeds - White Swanmid size pouch type seed packaging for - Echinacea White Swan
-0
Echinacea Seeds - White Swan
Starting at $3.39
Parsley Seeds - Plain or Single (Organic)small size packet type seed packaging for - Parsley Plain or Single Organic
-0
Heirloom
Organic
Parsley Seeds - Plain or Single (Organic)
Starting at $3.59
Tomato Seeds - Paste - Super Italian Pastemid size pouch type seed packaging for - Tomato Paste Super Italian Paste
-0
Heirloom
Tomato Seeds - Paste - Super Italian Paste
Starting at $2.99
Pepper Seeds - Sweet - Chinese Giant (Organic)mid size pouch type seed packaging for - Pepper Sweet Chinese Giant Organic
-0
Heirloom
Organic
Pepper Seeds - Sweet - Chinese Giant (Organic)
Starting at $3.79
Celosia Seeds - Plumed - Castle SeriesCelosia Seeds - Plumed - Castle Series
-0
Celosia Seeds - Plumed - Castle Series
Starting at $2.99
Pepper Seeds - Sweet - Shishito (Organic)Pepper Seeds - Sweet - Shishito (Organic)
-0
Heirloom
Organic
Pepper Seeds - Sweet - Shishito (Organic)
Starting at $3.99
Tomato Seeds - Slicing - Brandywine Yellow (Organic)small size packet type seed packaging for - Tomato Slicing Brandywine Yellow Organic
-0
Heirloom
Organic
Tomato Seeds - Slicing - Brandywine Yellow (Organic)
$4.09
Tomato Seeds - Cherry - Large Red Cherry (Organic)mid size pouch type seed packaging for - Tomato Cherry Large Red Cherry Organic
-0
Heirloom
Organic
Tomato Seeds - Cherry - Large Red Cherry (Organic)
Starting at $4.89
Tomato Seeds - Slicing - Ace 55 VFmid size pouch type seed packaging for - Tomato Slicing Ace 55 VF
-0
Heirloom
Tomato Seeds - Slicing - Ace 55 VF
Starting at $2.99
Basil Seeds - Thai Sweet Large Leafmid size pouch type seed packaging for - Basil Thai Sweet Large Leaf
-0
Heirloom
Basil Seeds - Thai Sweet Large Leaf
Starting at $3.99
Parsley Seeds - Italian Giant
Starting at $2.99
Watermelon Seeds - Picnic - Sangria Hybrid
Starting at $5.89
Tomato Seeds - Slicing - Vintage Wine
Starting at $2.99
Tomato Seeds - Paste - Amish Paste (Organic)
Starting at $3.79
[ { "featured_image": "files/radicchio-palla-rosa-seeds-Comp.jpg", "secondary_image": "products/non-gmo-sprouting-seed_48ce947a-14d7-449c-9c8e-7f101296624a.jpg", "price": 299, "handle": "radicchio-palla-rosa-seeds", "title": "Radicchio Seeds - Palla Rosa", "url": "/products/radicchio-palla-rosa-seeds", "available": true }, { "featured_image": "files/marigold-inca-ii-series-flower-seed-comp.jpg", "secondary_image": "products/marigold-inca-II-orange-flower-wm_700.jpg", "price": 479, "handle": "marigold-inca-ii-series-flower-seed", "title": "African Marigold Seeds - Inca II Series", "url": "/products/marigold-inca-ii-series-flower-seed", "available": true }, { "featured_image": "files/verbena-quartz-xp-series-flower-seed-comp.jpg", "secondary_image": "products/verbena-quartz-xp-series-mix-flowers-wm_700.jpg", "price": 469, "handle": "verbena-quartz-xp-series-flower-seed", "title": "Verbena Seeds - Quartz XP Series", "url": "/products/verbena-quartz-xp-series-flower-seed", "available": true }, { "featured_image": "files/tomato-pineapple-seeds-comp.jpg", "secondary_image": "files/MVS_1_lb.jpg", "price": 379, "handle": "tomato-pineapple-seeds", "title": "Tomato Seeds - Slicing - Pineapple", "url": "/products/tomato-pineapple-seeds", "available": true }, { "featured_image": "files/red-burgundy-okra-comp.jpg", "secondary_image": "products/Seed_Packet_bcb87369-c7a3-4493-bc6d-81483b1c30b4.jpg", "price": 299, "handle": "red-burgundy-okra", "title": "Okra Seeds - Red Burgundy", "url": "/products/red-burgundy-okra", "available": true }, { "featured_image": "files/organic-sugar-baby-watermelon-seeds-Comp.jpg", "secondary_image": "products/SSC-organic-generic-packet-com_3c720b97-ae6d-4fbc-968c-5673c7667186.jpg", "price": 359, "handle": "organic-sugar-baby-watermelon-seeds", "title": "Watermelon Seeds - Mini - Sugar Baby (Organic)", "url": "/products/organic-sugar-baby-watermelon-seeds", "available": true }, { "featured_image": "products/tomato-gardeners-delight-wm_1_1.jpg", "secondary_image": "products/non-gmo-seed-bag-sm_1_f6f4d332-22fe-4062-aa46-740ad9c097ae.png", "price": 329, "handle": "tomato-seeds-gardeners-delight", "title": "Tomato Seeds - Cherry - Gardener's Delight", "url": "/products/tomato-seeds-gardeners-delight", "available": true }, { "featured_image": "files/watermelon-striped-klondike-blue-ribbon-seeds-comp.jpg", "secondary_image": "products/Seed_Pouch_1_34623efb-010e-4c7d-a6c2-ad198a2fafa2.jpg", "price": 299, "handle": "watermelon-striped-klondike-blue-ribbon-seeds", "title": "Watermelon Seeds - Picnic - Striped Klondike Blue Ribbon", "url": "/products/watermelon-striped-klondike-blue-ribbon-seeds", "available": true }, { "featured_image": "files/echinacea-magnus-flower-seeds-comp.jpg", "secondary_image": "products/non-gmo-seed-bag-1-oz-sm_9fed5fdf-9615-48bf-afb8-6550f90df53d.png", "price": 299, "handle": "echinacea-magnus-flower-seeds", "title": "Echinacea Seeds - Magnus", "url": "/products/echinacea-magnus-flower-seeds", "available": true }, { "featured_image": "files/bachelors-buttons-mixed-colors-flower-seed-comp.jpg", "secondary_image": "products/non-gmo-seed-bag-sm_51f7b9d2-7e8d-400f-b5b4-1c64db38964b.png", "price": 299, "handle": "bachelors-buttons-mixed-colors-flower-seed", "title": "Bachelors Buttons Seeds - Mixed Colors", "url": "/products/bachelors-buttons-mixed-colors-flower-seed", "available": true }, { "featured_image": "files/broccoli-destiny-hybrid-Comp.jpg", "secondary_image": "products/non-gmo-seed-bag-sm_09cf96d8-65d2-49a5-ad34-0ae67efec2b6.png", "price": 399, "handle": "broccoli-destiny-hybrid", "title": "Broccoli Seeds - Destiny Hybrid", "url": "/products/broccoli-destiny-hybrid", "available": true }, { "featured_image": "files/Coleus-Wizard-Series-Mix-Pelleted-Comp.jpg", "secondary_image": "files/coleus-wizard-series-flower-seeds-comp.jpg", "price": 339, "handle": "coleus-wizard-series-flower-seeds", "title": "Coleus Seeds - Wizard Series (Pelleted)", "url": "/products/coleus-wizard-series-flower-seeds", "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/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/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/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/tomato-rio-grande-seeds-comp.jpg", "secondary_image": "products/non-gmo-sprouting-seed_0b71cc3d-5cba-4e5a-b476-1066cbf09ab8.jpg", "price": 299, "handle": "tomato-rio-grande-seeds", "title": "Tomato Seeds - Paste - Rio Grande", "url": "/products/tomato-rio-grande-seeds", "available": true }, { "featured_image": "files/hibiscus-luna-series-flower-seeds-comp.jpg", "secondary_image": "products/hibiscus-luna-series-rose-seed-wm_700.jpg", "price": 1536, "handle": "hibiscus-luna-series-flower-seeds", "title": "Hibiscus Seeds - Luna Series", "url": "/products/hibiscus-luna-series-flower-seeds", "available": true }, { "featured_image": "files/echinacea-white-swan-flower-seeds-comp.jpg", "secondary_image": "products/non-gmo-seed-bag-4-oz-sm_98ffc56f-94e9-4173-a8ae-530b8c57b72d.png", "price": 339, "handle": "echinacea-white-swan-flower-seeds", "title": "Echinacea Seeds - White Swan", "url": "/products/echinacea-white-swan-flower-seeds", "available": true }, { "featured_image": "files/parsley-seeds-plain-organic-comp.jpg", "secondary_image": "products/SSC-organic-generic-packet-com_df20b7ef-985d-4109-a819-6c468b6f574a.jpg", "price": 359, "handle": "parsley-seeds-plain-organic", "title": "Parsley Seeds - Plain or Single (Organic)", "url": "/products/parsley-seeds-plain-organic", "available": true }, { "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/tomato-seeds-super-italian-paste-comp.jpg", "secondary_image": "products/non-gmo-seed-bag-1-lb-com_d613e299-852b-4813-bb24-aa726564159d.jpg", "price": 299, "handle": "tomato-seeds-super-italian-paste", "title": "Tomato Seeds - Paste - Super Italian Paste", "url": "/products/tomato-seeds-super-italian-paste", "available": true }, { "featured_image": "files/organic-chinese-giant-pepper-seeds-comp.jpg", "secondary_image": "products/non-gmo-seed-bag-1-oz-sm_1_1_2_ac9ce9c4-2708-44ff-9893-881c1fa30417.jpg", "price": 379, "handle": "organic-chinese-giant-pepper-seeds", "title": "Pepper Seeds - Sweet - Chinese Giant (Organic)", "url": "/products/organic-chinese-giant-pepper-seeds", "available": true }, { "featured_image": "files/celosia-plumed-castle-series-flower-seeds-Comp.jpg", "secondary_image": "products/celosia-plumed-castle-series-yellow-seed-wm_700.jpg", "price": 299, "handle": "celosia-plumed-castle-series-flower-seeds", "title": "Celosia Seeds - Plumed - Castle Series", "url": "/products/celosia-plumed-castle-series-flower-seeds", "available": true }, { "featured_image": "files/pepper-seeds-hot-shishito-organic-comp.jpg", "secondary_image": "files/Pepper-Hot-Shishito-Organic-In-Hands_61e1cbff-d746-4ee6-baee-1b292364418c.jpg", "price": 399, "handle": "pepper-seeds-hot-shishito-organic", "title": "Pepper Seeds - Sweet - Shishito (Organic)", "url": "/products/pepper-seeds-hot-shishito-organic", "available": true }, { "featured_image": "files/Watermelon-Seeds-Picnic-Sangria-Hybrid-comp.jpg", "secondary_image": "products/Seed_Pouch_1_1_1_90413272-c6dc-4ff1-a31c-74a698a2af16.jpg", "price": 589, "handle": "watermelon-sangria-hybrid-seeds", "title": "Watermelon Seeds - Picnic - Sangria Hybrid", "url": "/products/watermelon-sangria-hybrid-seeds", "available": false }, { "featured_image": "files/vintage-wine-tomato-Comp.jpg", "secondary_image": "products/Seed_Packet_d613c1d0-44dd-47ef-a049-aec707123222.jpg", "price": 299, "handle": "vintage-wine-tomato", "title": "Tomato Seeds - Slicing - Vintage Wine", "url": "/products/vintage-wine-tomato", "available": false }, { "featured_image": "files/yellow-brandywine-tomato-Comp.jpg", "secondary_image": "products/SSC-organic-generic-packet-com_47ea0d38-921e-41ca-9017-829d0552fa07.jpg", "price": 409, "handle": "yellow-brandywine-tomato", "title": "Tomato Seeds - Slicing - Brandywine Yellow (Organic)", "url": "/products/yellow-brandywine-tomato", "available": true }, { "featured_image": "files/tomato-large-red-cherry-organic-seed-Comp.jpg", "secondary_image": "products/non-gmo-seed-bag-sus-wm-comp_a75d8424-6569-438e-bfdd-bafa0e5b1ff2.jpg", "price": 489, "handle": "tomato-large-red-cherry-organic-seed", "title": "Tomato Seeds - Cherry - Large Red Cherry (Organic)", "url": "/products/tomato-large-red-cherry-organic-seed", "available": true }, { "featured_image": "files/organic-amish-paste-tomato-seeds-comp.jpg", "secondary_image": "files/Sustainable_1_lb.jpg", "price": 379, "handle": "organic-amish-paste-tomato-seeds", "title": "Tomato Seeds - Paste - Amish Paste (Organic)", "url": "/products/organic-amish-paste-tomato-seeds", "available": false }, { "featured_image": "files/tomato-ace-55-vf-seeds-Comp.jpg", "secondary_image": "products/non-gmo-sprouting-seed_baf69691-286e-4cc9-ab84-1a8aeaa8f779.jpg", "price": 299, "handle": "tomato-ace-55-vf-seeds", "title": "Tomato Seeds - Slicing - Ace 55 VF", "url": "/products/tomato-ace-55-vf-seeds", "available": true }, { "featured_image": "files/Basil-Seeds-Thai-Sweet-Large-Leaf-comp.jpg", "secondary_image": "products/non-gmo-seed-bag-premium_0e5fe138-eed2-46b6-9d96-58b4f79b7d0b.png", "price": 399, "handle": "basil-seeds-thai-sweet-large-leaf", "title": "Basil Seeds - Thai Sweet Large Leaf", "url": "/products/basil-seeds-thai-sweet-large-leaf", "available": true } ]