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
696 Items
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Cotton Lint - NankeenCotton Lint - Nankeen
-0
Cotton Lint - Nankeen
$3.74
Amaryllis Bulbs - 24/26 -  Maria Goretti
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Amaryllis Bulbs - 24/26 - Maria Goretti
$22.90
Wood Handled Hoe - Garden Hand ToolsWood Handled Hoe - Garden Hand Tools
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Wood Handled Hoe - Garden Hand Tools
$62.95
Amaryllis Bulbs - 24/26 - Red Lion
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$22.99
Italian Oyster Mushroom Outdoor Log Growing Kit (Organic)Italian Oyster Mushroom Outdoor Log Growing Kit (Organic)
-0
Organic
Italian Oyster Mushroom Outdoor Log Growing Kit (Organic)
$29.99
Cotton Lint - Brown KingCotton Lint - Brown King
-0
Cotton Lint - Brown King
$3.74
Cotton Lint - Mississippi GreenCotton Lint - Mississippi Green
-0
Cotton Lint - Mississippi Green
$3.74
Tomato Seeds - Green Cherry
-0
Heirloom
Tomato Seeds - Green Cherry
Starting at $3.09
Spinach Seeds - Correnta Hybrid
-0
Spinach Seeds - Correnta Hybrid
Starting at $2.79
Harvesting Bucket With Strap
-0
Harvesting Bucket With Strap
$51.63
Radish Seeds - Shirahime Hatsuka Daikon - Clearance Seeds
-73%
Heirloom
Radish Seeds - Shirahime Hatsuka Daikon - Clearance Seeds
Starting at $40.00
Snapdragon Seeds - Giant Tetra MixSnapdragon Seeds - Giant Tetra Mix
-0
Snapdragon Seeds - Giant Tetra Mix
Starting at $3.39
Cauliflower Seeds - Snowball Early
-0
Heirloom
Cauliflower Seeds - Snowball Early
Starting at $2.99
Cotton Lint - Mississippi BrownCotton Lint - Mississippi Brown
-0
Cotton Lint - Mississippi Brown
$3.74
custom box packaging for Basic Seed Starter Kits for BeginnersSeed starter kit with components on a wooden surface
-0
Basic Seed Starter Kits for Beginners
$14.99
Rain GaugeRain Gauge
-0
Rain Gauge
$9.95
Minute Soil+ - Amended Compressed Coco Coir PucksMinute Soil+ - Amended Compressed Coco Coir Pucks
-0
Minute Soil+ - Amended Compressed Coco Coir Pucks
$58.22
custom packaging for Dual Action Plant Labels Sticky Insect TrapSuper Effective Industrial Grade Sticky Adhesive, Quickly protect plants with ease, ideal for potted plants gardens & greenhouses
-0
Dual Action Plant Labels Sticky Insect Trap
$16.49
Rhubarb Seeds (Organic)
-0
Heirloom
Organic
Rhubarb Seeds (Organic)
Starting at $3.99
Dried Wild Lobster MushroomsDried Wild Lobster Mushrooms
-0
Dried Wild Lobster Mushrooms
$12.50
Beet - Rainbow Blend (Organic) - Microgreen Seeds
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Heirloom
Organic
Beet - Rainbow Blend (Organic) - Microgreen Seeds
Starting at $9.56
Chaga Mushroom TinctureChaga Mushroom Tincture
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Starting at $29.99
Corn Seeds - Sweet - Eden RMN F1 HybridCorn Seeds - Sweet - Eden RMN F1 Hybrid
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Starting at $5.09
Leaf Scoops - Garden Hand Tools
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Leaf Scoops - Garden Hand Tools
$10.95
Planting Stakes and Cord SetPlanting Stakes and Cord Set
-0
Planting Stakes and Cord Set
$8.95
Chain Lock Tree Tie
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Chain Lock Tree Tie
$9.95
Raised Garden Bed KitRaised Garden Bed Kit
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Raised Garden Bed Kit
Starting at $82.96
Seed Assortment - Flowers for Container Gardening
$12.44
Cotton Lint - Sea Island Brown
$3.74
Bean Seeds - Karikachi #3 Soybean - Clearance Seeds
Starting at $20.00
3"x5" Double-Sided Blue Sticky Card Insect Trap
$24.99
Dried Wild Porcini Mushrooms
$12.50
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