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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
4042 Items
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Brussels Sprouts - CatskillBrussels Sprouts - Catskill
-0
Heirloom
Brussels Sprouts - Catskill
Starting at $2.99
Pea Seeds - Shelling - Lincolnmid size pouch type seed packaging for - Pea Shelling Lincoln
-0
Heirloom
Pea Seeds - Shelling - Lincoln
Starting at $3.29
Carrot Seeds - Scarlet Nantes (Organic)small size packet type seed packaging for - Carrot Scarlet Nantes Organic
-0
Heirloom
Organic
Carrot Seeds - Scarlet Nantes (Organic)
Starting at $3.79
Pea - Afila Tendril - Microgreens SeedsPea - Afila Tendril - Microgreens Seeds
-0
Heirloom
Pea - Afila Tendril - Microgreens Seeds
Starting at $3.14
Spicy Salad Mix (Organic) - Microgreens SeedsSpicy Salad Mix (Organic) - Microgreens Seeds
-0
Heirloom
Organic
Staff Favorite
Spicy Salad Mix (Organic) - Microgreens Seeds
Starting at $3.59
Cabbage Seeds - Copenhagen Market
-0
Heirloom
Cabbage Seeds - Copenhagen Market
Starting at $2.99
BioStrate 160 GSM - Felt Hydroponic Growing PadsBioStrate 160 GSM - Felt Hydroponic Growing Pads
-0
BioStrate 160 GSM - Felt Hydroponic Growing Pads
Starting at $18.98
Tomatillo Seeds - Grande Rio VerdeTomatillo Seeds - Grande Rio Verde
-0
Heirloom
Tomatillo Seeds - Grande Rio Verde
Starting at $2.99
Tarragon Seeds - Russianmid size pouch type seed packaging for - Tarragon Russian
-0
Heirloom
Tarragon Seeds - Russian
Starting at $3.29
Squash Seeds - Winter - Table Queen Acornmid size pouch type seed packaging for - Squash Winter Table Queen Acorn
-0
AAS Winner
Heirloom
Squash Seeds - Winter - Table Queen Acorn
Starting at $2.99
Petunia Seeds - Dreams Series (pelleted)Petunia Seeds - Dreams Series (pelleted)
-0
Petunia Seeds - Dreams Series (pelleted)
Starting at $2.99
1020 Heavy Duty Microgreens Trays - With Holes - Black - Shallow1020 Heavy Duty Microgreens Trays - With Holes - Black - Shallow
-0
1020 Heavy Duty Microgreens Trays - With Holes - Black...
Starting at $14.69
Dill - Bouquet - Microgreens SeedsDill - Bouquet - Microgreens Seeds
-0
Heirloom
Dill - Bouquet - Microgreens Seeds
Starting at $6.10
Cucumber Seeds - Ashleymid size pouch type seed packaging for - Cucumber Ashley
-28%
Heirloom
Cucumber Seeds - Ashley
Starting at $1.99
Lavender Seeds (Organic)small size packet type seed packaging for - Lavender Organic
-0
Heirloom
Organic
Lavender Seeds (Organic)
Starting at $3.59
Pumpkin Seeds - Jarrahdalesmall size packet type seed packaging for - Pumpkin Jarrahdale
-0
Heirloom
Pumpkin Seeds - Jarrahdale
Starting at $3.39
Sunflower Microgreens Seeds (Organic)Sunflower Microgreens Seeds (Organic)
-0
Heirloom
Organic
Staff Favorite
Sunflower Microgreens Seeds (Organic)
Starting at $16.73
Chamomile Seeds - German (Organic)small size packet type seed packaging for - Chamomile German Organic
-0
Heirloom
Organic
Chamomile Seeds - German (Organic)
Starting at $7.27
Kale Seeds - Dwarf SiberianKale Seeds - Dwarf Siberian
-0
Heirloom
Kale Seeds - Dwarf Siberian
Starting at $3.99
Bean Salad Mix - Organic - Sprouting SeedsBean Salad Mix - Organic - Sprouting Seeds
-0
Heirloom
Organic
Staff Favorite
Bean Salad Mix - Organic - Sprouting Seeds
Starting at $5.11
Cat Grass Seeds - Seed Blend (Organic)Cat Grass Seeds - Seed Blend (Organic)
-0
Heirloom
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Cat Grass Seeds - Seed Blend (Organic)
Starting at $6.99
Pepper Seeds - Hot - Anaheim ChiliPepper Seeds - Hot - Anaheim Chili
-0
Heirloom
Pepper Seeds - Hot - Anaheim Chili
Starting at $3.09
Kohlrabi - Purple Vienna (Organic) - Microgreens Seedsmid size pouch type seed packaging for - Kohlrabi Purple Vienna Organic Microgreens
-0
Heirloom
Organic
Kohlrabi - Purple Vienna (Organic) - Microgreens Seeds
Starting at $9.51
Oxygen Absorbers Packets by OxyFreeOxygen Absorbers Packets by OxyFree
-0
Oxygen Absorbers Packets by OxyFree
Starting at $13.19
Bean Seeds - Bush - Tendergreen (Organic)small size packet type seed packaging for - Bean Bush Tendergreen Organic
-38%
Heirloom
Organic
Bean Seeds - Bush - Tendergreen (Organic)
Starting at $2.09
Pepper Seeds - Sweet - Purple BeautyPepper Seeds - Sweet - Purple Beauty
-0
Heirloom
Pepper Seeds - Sweet - Purple Beauty
Starting at $2.99
Pepper Seeds - Hot - Serrano Tampiquenomid size pouch type seed packaging for - Pepper Hot Serrano Tampiqueno
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Heirloom
Pepper Seeds - Hot - Serrano Tampiqueno
Starting at $2.99
Kale - Black Tuscan aka Lacinato or Dinosaur (Organic) - Microgreens SeedsKale - Black Tuscan aka Lacinato or Dinosaur (Organic) - Microgreens Seeds
-0
Heirloom
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Kale - Black Tuscan aka Lacinato or Dinosaur (Organic) -...
Starting at $9.25
Tomato Seeds - Slicing - Oregon Springmid size pouch type seed packaging for - Zinnia Magellan Series Orange
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Heirloom
Tomato Seeds - Slicing - Oregon Spring
Starting at $2.99
Tomato Seeds - Paste - San Marzano Determinate
Starting at $2.99
Cucumber Seeds - Lemon
Starting at $2.99
Mustard - Wasabi (Organic) - Microgreens Seeds
Starting at $6.29
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