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
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628 Items
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Lobelia Seeds - Vulcan Red (Pelleted)mid size pouch type seed packaging for - Lobelia Vulcan Red Pelleted
-0
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$6.49
Radish Seeds - Butter Globesmall size packet type seed packaging for - Radish Butter Globe
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Radish Seeds - Butter Globe
Starting at $2.99
Sedum Seeds - Voodoo (Pelleted)mid size pouch type seed packaging for - Sedum Voodoo Pelleted
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Sedum Seeds - Voodoo (Pelleted)
Starting at $3.59
Pak Choi Seeds - Da Hong Winter Hybridmid size pouch type seed packaging for - Pak Choi Da Hong Winter Hybrid
-50%
Pak Choi Seeds - Da Hong Winter Hybrid
Starting at $1.99
Lettuce Seeds - Romaine - Silviasmall size packet type seed packaging for - Lettuce Romaine Silvia
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Heirloom
Lettuce Seeds - Romaine - Silvia
Starting at $2.99
Mustard Ruby Streakmid size pouch type seed packaging for - Mustard Ruby Streak
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Heirloom
Mustard Seeds - Ruby Streak
Starting at $3.99
Basil Seeds - Red Rubin (Organic) - Microgreens SeedsBasil Seeds - Red Rubin (Organic) - Microgreens Seeds
-34%
Heirloom
Organic
Basil Seeds - Red Rubin (Organic) - Microgreens Seeds
Starting at $13.62
California Poppy Seeds - Ballerina Mix
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Heirloom
California Poppy Seeds - Ballerina Mix
Starting at $3.09
Zinnia Seeds - Thumbelina Mix (Organic)small size packet type seed packaging for - Zinnia Thumbelina Mix Organic
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Organic
Zinnia Seeds - Thumbelina Mix (Organic)
Starting at $3.59
Zinnia Seeds - Persian Carpet MixZinnia Seeds - Persian Carpet Mix
-0
AAS Winner
Zinnia Seeds - Persian Carpet Mix
Starting at $2.99
Watermelon Seeds - Tom Watson
-0
Heirloom
Watermelon Seeds - Tom Watson
Starting at $2.99
Lobelia Seeds - RosamondLobelia Seeds - Rosamond
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AAS Winner
Lobelia Seeds - Rosamond
Starting at $2.99
Tomato Seeds - Slicing - Brandywine Red Potato Leafmid size pouch type seed packaging for - Zinnia Magellan Series Orange
-0
Heirloom
Tomato Seeds - Slicing - Brandywine Red Potato Leaf
Starting at $2.99
Pepper Seeds - Hot - Fuego Trail Hybridmid size pouch type seed packaging for - Pepper Hot Fuego Trail Hybrid
-58%
Pepper Seeds - Hot - Fuego Trail Hybrid
Starting at $1.99
Pepper Seeds - Ornamental - Patio Fire n Icemid size pouch type seed packaging for - Pepper Ornamental Patio Fire n Ice
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Pepper Seeds - Ornamental - Patio Fire n Ice
Starting at $3.09
Oriental Poppy Seeds - Allegromid size pouch type seed packaging for - Oriental Poppy Allegro
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Oriental Poppy Seeds - Allegro
Starting at $3.39
Tulip Bulbs - Darwin Hybrid - Mixed
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Tulip Bulbs - Darwin Hybrid - Mixed
Starting at $17.99
Kale Seeds - Red - Microgreens Seeds
-23%
Heirloom
Kale Seeds - Red - Microgreens Seeds
Starting at $13.36
custom seed bag packaging for Seed Assortment - Companion PlantingSeed Assortment - Companion Planting
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Seed Assortment - Companion Planting
$17.54
Pepper Seeds - Hot - NuMex 64small size packet type seed packaging for - Pepper Hot NuMex 64
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Pepper Seeds - Hot - NuMex 64
Starting at $2.99
Ornamental Millet Seeds - Jestermid size pouch type seed packaging for - Ornamental Millet Jester
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Ornamental Millet Seeds - Jester
Starting at $9.58
Sorrel Seeds - Red Apache (Organic)mid size pouch type seed packaging for - Sorrel Red Apache Organic
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Sorrel Seeds - Red Apache (Organic)
Starting at $4.39
Heuchera Seeds - Ruby Bells (Pelleted)mid size pouch type seed packaging for - Heuchera Ruby Bells Pelleted
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Heuchera Seeds - Ruby Bells (Pelleted)
Starting at $3.99
Tulip Bulbs - Double Early - Mixed
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Tulip Bulbs - Double Early - Mixed
Starting at $18.99
Pepper Seeds - Hot - Ristra Cayenne Hybridmid size pouch type seed packaging for - Pepper Hot Ristra Cayenne Hybrid
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Starting at $4.99
Strawberry Roots - June Bearing - Allstar Hybrid
$12.48 $24.95
Lettuce Seeds, Leaf - Royal Oakleaf - Organic
Starting at $3.59
Pepper Seeds - Sweet - Cabernet Hybrid
Starting at $4.39
Potato - Red Norland (Organic)
Starting at $18.53
Mustard Seeds - Scarlet Frill - Hybrid
Starting at $2.79
Pepper Seeds - Sweet - Rosé Hybrid
Starting at $4.09
Strawberry Roots - June Bearing - Chandler Hybrid
$12.48 $24.95
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