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
697 Items
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Sweet Protein Mix - Organic - Sprouting SeedsSweet Protein Mix - Organic - Sprouting Seeds
-0
Heirloom
Organic
Sweet Protein Mix - Organic - Sprouting Seeds
Starting at $6.60
Cress Seeds - Watercress (Organic)mid size pouch type seed packaging for - Cress Watercress Organic
-51%
Organic
Cress Seeds - Watercress (Organic)
Starting at $1.99
Arugula Seeds - Rocket (Roquette)
-0
Heirloom
Arugula Seeds - Rocket (Roquette)
Starting at $2.99
Clover Trio Cover Crop Seed MixClover Trio Cover Crop Seed Mix
-0
Clover Trio Cover Crop Seed Mix
Starting at $6.39
Cigar Tobacco Seed CollectionCigar Tobacco Seed Collection Collage
-0
Heirloom
Tobacco Seeds - Cigar Collection
Starting at $20.06
12 Cell Seed Starting Set - Tray, Insert, Dome12 Cell Seed Starting Set - Tray, Insert, Dome
-0
12 Cell Seed Starting Set - Tray, Insert, Dome
Starting at $16.53
Compact Emergency Bug Out Bag - 19 PackCompact Emergency Bug Out Bag - 19 Pack
-0
Heirloom
Staff Favorite
Compact Emergency Bug Out Bag - 19 Pack
$21.62
The True Leaf Market Vegetable Growing GuideThe True Leaf Market Vegetable Growing Guide
-0
The True Leaf Market Vegetable Growing Guide
$5.00
Sprouting Kit - Fully Raw's 12 Best SproutsSprouting Kit - Fully Raw's 12 Best Sprouts
-0
Organic
Staff Favorite
Sprouting Kit - Fully Raw's 12 Best Sprouts
$22.27
Lavender Seeds - Hidcote Blue
-0
Lavender Seeds - Hidcote Blue
Starting at $4.29
Celery Microgreens SeedsCelery Microgreens Seeds
-0
Heirloom
Celery Microgreens Seeds
Starting at $6.21
Fenugreek Seedssmall size packet type seed packaging for - Fenugreek
-0
Heirloom
Fenugreek Seeds
Starting at $2.99
Seed Assortment - Flower GardenSeed Assortment - Flower Garden
-0
Seed Assortment - Flower Garden
Starting at $11.02
Sorghum Seeds - Rox Orange Syrup Canesmall size packet type seed packaging for - Sorghum Rox Orange Syrup Cane
-0
Heirloom
Sorghum Seeds - Rox Orange Syrup Cane
Starting at $2.99
Rutabaga Seeds - LaurentianRutabaga Seeds - Laurentian
-0
Heirloom
Rutabaga Seeds - Laurentian
Starting at $2.99
Lavender Seeds - Munstead
-4%
Heirloom
Lavender Seeds - Munstead
Starting at $3.99
1020 Heavy Duty Microgreens Trays - No Holes - Green - Shallow
-0
1020 Heavy Duty Microgreens Trays - No Holes - Green...
Starting at $16.79
1020 Heavy Duty Microgreens Trays - With Holes - Green - Shallow
-0
1020 Heavy Duty Microgreens Trays - With Holes - Green...
Starting at $16.79
Marigold Seeds - Nematode ControlMarigold Seeds - Nematode Control
-0
Marigold Seeds - Nematode Control
Starting at $2.99
Bean Seeds - Bush - Garbanzo (Organic)Bean Seeds - Bush - Garbanzo (Organic)
-0
Heirloom
Organic
Bean Seeds - Bush - Garbanzo (Organic)
Starting at $5.17
Pepper Seeds - Sweet - Shishito (Organic)Pepper Seeds - Sweet - Shishito (Organic)
-0
Heirloom
Organic
Pepper Seeds - Sweet - Shishito (Organic)
Starting at $3.99
Superfood Mix - Microgreens Seeds (Organic)Superfood Mix - Microgreens Seeds (Organic)
-0
Organic
Superfood Mix - Microgreens Seeds (Organic)
Starting at $7.67
contact customer service at 801-491-8700 for instructions helpPerlite Soil Amendment
-0
Perlite Soil Amendment
Starting at $10.60
Oats and Peas Cover Crop Seed MixOats and Peas Cover Crop Seed Mix
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Oats and Peas Cover Crop Seed Mix
Starting at $4.28
No-Till Pollinator Friendly Cover Crop Mix (Organic)No-Till Pollinator Friendly Cover Crop Mix (Organic)
-0
Organic
No-Till Pollinator Friendly Cover Crop Mix (Organic)
Starting at $6.41
Radish - Champion - Microgreens SeedsRadish - Champion - Microgreens Seeds
-0
Heirloom
Radish - Champion - Microgreens Seeds
Starting at $5.75
Fenugreek Seeds - MicrogreensFenugreek Seeds - Microgreens
-0
Heirloom
Fenugreek Seeds - Microgreens
Starting at $5.05
Spinach Seeds - Winter Giantsmall size packet type seed packaging for - Spinach Winter Giant
-0
Heirloom
Spinach Seeds - Winter Giant
Starting at $2.99
Wildflower Seeds - Monarch Butterfly MixWildflower Seeds - Monarch Butterfly Mix
-0
Wildflower Seeds - Monarch Butterfly Mix
Starting at $3.09
Parsley Seeds - Italian Giant
Starting at $2.99
Onion Sets - Spanish Yellow
$6.48 $12.95
Wheat Seeds - Hard White
Starting at $2.85
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