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
97 Items
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Seasonal Seed Assortment - SummerSeasonal Seed Assortment - Summer
-0
Heirloom
Seasonal Seed Assortment - Summer
$20.73
Pearl Barley (Organic) - Bulk Grains & FoodsPearl Barley (Organic) - Bulk Grains & Foods
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Organic
Pearl Barley (Organic) - Bulk Grains & Foods
Starting at $8.33
Wheat Seeds - Yamhillmid size pouch type seed packaging for - Wheat Yamhill
-0
Heirloom
Wheat Seeds - Yamhill
Starting at $2.63
Millet - Hulled (Organic)Millet - Hulled (Organic)
-0
Heirloom
Millet - Hulled (Organic)
Starting at $9.80
Mountain Valley Herb SeedsMountain Valley Herb Seeds
-0
Mountain Valley Herb Seeds
$56.46
French Lentils (Organic) - Bulk Grains & FoodsFrench Lentils (Organic) - Bulk Grains & Foods
-0
Organic
French Lentils (Organic) - Bulk Grains & Foods
Starting at $9.29
Whole Millet (Organic) - Bulk Grains & FoodsWhole Millet (Organic) - Bulk Grains & Foods
-0
Organic
Whole Millet (Organic) - Bulk Grains & Foods
Starting at $9.68
Barley Seeds - Common Grain
-0
Heirloom
Barley Seeds - Common Grain
Starting at $2.63
Sprouting Seed Assortment - 12 Pack - PremeasuredSprouting Seed Assortment - 12 Pack - Premeasured
-0
Organic
Staff Favorite
Sprouting Seed Assortment - 12 Pack - Premeasured
$15.71
custom packaging for Tofu Kit: Medium Plastic MoldTofu Kit: Medium Plastic Mold
-0
Organic
Tofu Kit: Medium Plastic Mold
$51.02
Amaranth (Organic) - Bulk Grains & Foods
-0
Organic
Amaranth (Organic) - Bulk Grains & Foods
Starting at $7.10
Smart Seal Lids - Multi-Color 10 PackSmart Seal Lids - Multi-Color 10 Pack
-0
Smart Seal Lids - Multi-Color 10 Pack
$104.99
Millet Seeds - Japanese
-0
Heirloom
Millet Seeds - Japanese
Starting at $4.53
Quinoa Grain Organic PlantQuinoa Grain Organic Seeds
-0
Organic
Quinoa (Organic) - Bulk Grains & Foods
Starting at $3.69
Triticale (Organic) - Bulk Grain & FoodsTriticale (Organic) - Bulk Grain & Foods
-0
Organic
Triticale (Organic) - Bulk Grain & Foods
Starting at $8.56
Amaranth Seeds - All Red Leafmid size pouch type seed packaging for - Amaranth All Red Leaf
-0
Amaranth Seeds - All Red Leaf
Starting at $2.99
Basic Growing For Health Kit - Sprouts, Microgreens, and Wheatgrass
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Basic Growing For Health Kit - Sprouts, Microgreens, and Wheatgrass
$56.51
Stainless Steel Quick Pickle Kit + Pickling Cucumber SeedsStainless Steel Quick Pickle Kit + Pickling Cucumber Seeds
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Stainless Steel Quick Pickle Kit + Pickling Cucumber Seeds
$17.83
Fermenting Crock Pot - Nik Schmittceramic lid sits in groove that should be permanently filled with water, croc pot has a handle on the side, keep brine level at least 3cm above the weighting stone, keep vegetables at around 4/5th's of the overall pot height
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Starting at $142.22
Hulled Millet (Organic) - Bulk Grains & FoodsHulled Millet (Organic) - Bulk Grains & Foods
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Starting at $9.80
Pearled Emmer Wheat Farro (Organic) - Bulk GrainsPearled Emmer Wheat Farro (Organic) - Bulk Grains
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Heirloom
Organic
Pearled Emmer Wheat Farro (Organic) - Bulk Grains
Starting at $7.55
Triticale Seeds - Forerunner
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Triticale Seeds - Forerunner
Starting at $3.14
Triticale Seeds - Bunker
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Triticale Seeds - Bunker
Starting at $2.63
Fermenting Crock Pot - BoleslawiecFermenting Crock Pot - Boleslawiec
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Starting at $102.80
5 Gallon Bucket - Bucket only
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5 Gallon Bucket - Bucket only
$11.40
Fifo - Mini Can Tracker - Can RotatorFifo - Mini Can Tracker - Can Rotator
-0
Fifo - Mini Can Tracker - Can Rotator
$48.11
Kimchi Seed Assortment + Fermentation KitKimchi Seed Assortment + Fermentation Kit
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Kimchi Seed Assortment + Fermentation Kit
$40.78
Fermenting Crock Pot - K&K Keramik Garopf
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Fermenting Crock Pot - K&K Keramik Garopf
Starting at $133.00
Mountain Valley Fruit Seeds
$55.82
Barley Seeds - Jet
Starting at $2.99
5 Gallon Bucket with Ratcheting Lid
Starting at $15.13
Oats Seeds - Tesuque - Organic
Starting at $6.11
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