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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
174 Items
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Geranium Seeds - Maverick SeriesGeranium Maverick Series Star pink w rose eye
-0
Geranium Seeds - Maverick Series
Starting at $4.69
Petunia Seeds - Supercascade Series (pelleted)Petunia Seeds - Supercascade Series (pelleted)
-0
Petunia Seeds - Supercascade Series (pelleted)
Starting at $2.99
Petunia Seeds - Easy Wave Series (pelleted)Petunia Seeds - Easy Wave Series (pelleted)
-0
Petunia Seeds - Easy Wave Series (pelleted)
Starting at $3.69
Chives Seeds (Organic)small size packet type seed packaging for - Chives Organic
-0
Heirloom
Organic
Chives Seeds (Organic)
Starting at $3.59
Begonia Seeds - Tuberous - Nonstop Series (Pelleted)Begonia Seeds - Tuberous - Nonstop Series (Pelleted)
-0
Staff Favorite
Begonia Seeds - Tuberous - Nonstop Series (Pelleted)
Starting at $4.69
Geranium Seeds - Pinto Premium SeriesGeranium Seeds - Pinto Premium Series
-0
AAS Winner
Geranium Seeds - Pinto Premium Series
Starting at $4.99
Petunia Seeds - Dreams Series (pelleted)Petunia Seeds - Dreams Series (pelleted)
-0
Petunia Seeds - Dreams Series (pelleted)
Starting at $2.99
Lettuce Seeds - Leaf - Lollo Rosso (Organic)mid size pouch type seed packaging for - Lettuce Leaf Lollo Rosso Organic
-0
Heirloom
Organic
Lettuce Seeds - Leaf - Lollo Rosso (Organic)
Starting at $3.59
Petunia Seeds - Madness Series (pelleted)Petunia Seeds - Madness Series (pelleted)
-0
Petunia Seeds - Madness Series (pelleted)
Starting at $3.09
Chives SeedsChives Seeds
-0
Heirloom
Chives Seeds
Starting at $2.99
Petunia Seeds - Daddy Series (Pelleted)Petunia Seeds - Daddy Series (Pelleted)
-0
Petunia Seeds - Daddy Series (Pelleted)
Starting at $3.09
Zinnia Seeds - Pumila Pompon
-0
Heirloom
Zinnia Seeds - Pumila Pompon
Starting at $3.39
Statice Seeds - QIS SeriesStatice Seeds - QIS Series
-0
Statice Seeds - QIS Series
Starting at $3.39
Wildflower Seeds - Bee MixWildflower Seeds - Bee Mix
-0
Wildflower Seeds - Bee Mix
Starting at $2.99
Lemon Mint Seedsmid size pouch type seed packaging for - Lemon Mint
-0
Heirloom
Lemon Mint Seeds
Starting at $2.99
Impatiens Seeds - Accent SeriesImpatiens Seeds - Accent Series
-0
Impatiens Seeds - Accent Series
Starting at $3.99
Strawberry Seeds - Berries Galore Hybrid PinkStrawberry Seeds - Berries Galore Hybrid Pink
-0
Strawberry Seeds - Berries Galore Hybrid Pink
Starting at $7.49
Radish Seeds - French Breakfast - Organicsmall size packet type seed packaging for - Radish French Breakfast Organic
-0
Heirloom
Organic
Radish Seeds - French Breakfast - Organic
Starting at $3.59
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
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
Radish Seeds - French Breakfastmid size pouch type seed packaging for - Radish French Breakfast
-0
Heirloom
Radish Seeds - French Breakfast
Starting at $2.99
Vinca Seeds - Pacifica XP SeriesVinca Seeds - Pacifica XP Series
-0
Vinca Seeds - Pacifica XP Series
Starting at $4.59
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
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
Zinnia Seeds - Profusion Series (Coated)Zinnia Seeds - Profusion Series (Coated)
-0
AAS Winner
Zinnia Seeds - Profusion Series (Coated)
Starting at $3.59
Swiss Chard Seeds - Rainbow Mixture
Starting at $3.89
Swiss Chard Seeds - Rainbow Mixture (Organic)
Starting at $3.69
Chives - Microgreens Seeds
Starting at $8.27
Thyme Seeds - Creeping Thyme
Starting at $2.99
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