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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
629 Items
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Beet Seeds - Chioggiasmall size packet type seed packaging for - Beet Chioggia
-0
Heirloom
Beet Seeds - Chioggia
Starting at $2.99
Nasturtium Seeds - Alaskamid size pouch type seed packaging for - Nasturtium Alaska
-0
Nasturtium Seeds - Alaska
Starting at $2.99
Sorrel Seeds - Red Veinedmid size pouch type seed packaging for - Sorrel Red Veined
-0
Heirloom
Staff Favorite
Sorrel Seeds - Red Veined
Starting at $3.39
Radish Seeds - WatermelonRadish Seeds - Watermelon
-0
Heirloom
Radish Seeds - Watermelon
Starting at $3.99
Swiss Chard Seeds - Ruby RedSwiss Chard Seeds - Ruby Red
-0
Heirloom
Swiss Chard Seeds - Ruby Red
Starting at $2.99
Gazania Seeds - New Day SeriesGazania Seeds - New Day Series
-0
Staff Favorite
Gazania Seeds - New Day Series
Starting at $5.09
Petunia Seeds - Double Cascade Series (Pelleted)Petunia Seeds - Double Cascade Series (Pelleted)
-2%
Petunia Seeds - Double Cascade Series (Pelleted)
Starting at $3.29
Zinnia Seeds - Zahara Series (Coated)Zinnia Seeds - Zahara Series (Coated)
-0
Zinnia Seeds - Zahara Series (Coated)
Starting at $3.89
Pepper Seeds - Hot - Bhut Jolokia Ghostsmall size packet type seed packaging for - Pepper Hot Bhut Jolokia Ghost
-0
Heirloom
Pepper Seeds - Hot - Bhut Jolokia Ghost
Starting at $4.89
Pepper Seeds - Hot - Tabascomid size pouch type seed packaging for - Pepper Hot Tabasco
-0
Heirloom
Pepper Seeds - Hot - Tabasco
Starting at $2.99
Pepper Seeds - Hot - Big JimPepper Seeds - Hot - Big Jim
-0
Heirloom
Pepper Seeds - Hot - Big Jim
Starting at $2.99
Lettuce Seeds - Super Red Romainesmall size packet type seed packaging for - Lettuce Super Red Romaine
-0
Heirloom
Lettuce Seeds - Super Red Romaine
Starting at $2.99
Mixed Greens Seeds - Mesclun Mix - Organicsmall size packet type seed packaging for - Mixed Greens Mesclun Mix Organic
-0
Heirloom
Organic
Mixed Greens Seeds - Mesclun Mix - Organic
Starting at $3.59
Snapdragon Seeds - Liberty Classic Series Mixmid size pouch type seed packaging for - Snapdragon Liberty Classic Series Mix
-0
Snapdragon Seeds - Liberty Classic Series Mix
Starting at $3.39
Vinca Seeds - Pacifica XP SeriesVinca Seeds - Pacifica XP Series
-0
Vinca Seeds - Pacifica XP Series
Starting at $4.59
Strawberry Seeds - Berries Basket White HybridStrawberry Seeds - Berries Basket White Hybrid
-0
Staff Favorite
Strawberry Seeds - Berries Basket White Hybrid
Starting at $7.49
Hollyhock Seeds - Summer Carnival Mixmid size pouch type seed packaging for - Hollyhock Summer Carnival Mix
-0
AAS Winner
Hollyhock Seeds - Summer Carnival Mix
Starting at $2.99
Okra Seeds - Hill Country RedOkra Seeds - Hill Country Red
-0
Heirloom
Staff Favorite
Okra Seeds - Hill Country Red
Starting at $3.29
Pepper Seeds - Hot - Habanero Caribbean Redmid size pouch type seed packaging for - Pepper Hot Habanero Caribbean Red
-0
Heirloom
Pepper Seeds - Hot - Habanero Caribbean Red
Starting at $3.39
Petunia Seeds - Double Madness Series (pelleted)Petunia Seeds - Double Madness Series (pelleted)
-0
Petunia Seeds - Double Madness Series (pelleted)
Starting at $3.69
Begonia Seeds - Fibrous - Cocktail Series (Pelleted)Begonia Seeds - Fibrous - Cocktail Series (Pelleted)
-0
Begonia Seeds - Fibrous - Cocktail Series (Pelleted)
Starting at $2.99
Pepper Seeds - Hot - Cayenne Long Red Thin (Organic)small size packet type seed packaging for - Pepper Hot Cayenne Long Red Thin Organic
-0
Heirloom
Organic
Pepper Seeds - Hot - Cayenne Long Red Thin (Organic)
Starting at $3.59
Bean Seeds - Bush - Dark Red Kidney (Organic)mid size pouch type seed packaging for - Bean Bush Dark Red Kidney Organic
-0
Heirloom
Organic
Bean Seeds - Bush - Dark Red Kidney (Organic)
Starting at $3.59
Zinnia Seeds - Profusion Series (Coated)Zinnia Seeds - Profusion Series (Coated)
-0
AAS Winner
Zinnia Seeds - Profusion Series (Coated)
Starting at $3.59
Pepper Seeds - Sweet - Marconi Redsmall size packet type seed packaging for - Pepper Sweet Marconi Red
-0
Heirloom
Pepper Seeds - Sweet - Marconi Red
Starting at $2.99
Radicchio Seeds - Palla Rosamid size pouch type seed packaging for - Radicchio Palla Rosa
-0
Heirloom
Radicchio Seeds - Palla Rosa
Starting at $2.99
Pepper Seeds - Hot - Large Red Cherry Hotmid size pouch type seed packaging for - Pepper Hot Large Red Cherry Hot
-0
Heirloom
Pepper Seeds - Hot - Large Red Cherry Hot
Starting at $3.29
Shiso (Perilla) - Purple - Microgreens Seeds
Starting at $7.20
Red Cabbage Microgreens Seeds
Starting at $5.94
Spinach Seeds - Red Malabar
$3.99
Sunflower Seeds - Velvet Queen
Starting at $2.99
Yarrow Seeds - Red
$2.99
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