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
2744 Items
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Pepper Seeds - Sweet - Big Bertha HybridPepper Seeds - Sweet - Big Bertha Hybrid
-0
Pepper Seeds - Sweet - Big Bertha Hybrid
Starting at $4.59
Coleus Seeds - Jazz Combo Mixmid size pouch type seed packaging for - Coleus Jazz Combo Mix
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Coleus Seeds - Jazz Combo Mix
Starting at $4.19
Chard Seeds - Perpetual Spinachsmall size packet type seed packaging for - Chard Perpetual Spinach
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Heirloom
Chard Seeds - Perpetual Spinach
Starting at $2.99
Cucumber Seeds - Marketmore 80mid size pouch type seed packaging for - Zinnia Magellan Series Orange
-28%
Heirloom
Cucumber Seeds - Marketmore 80
Starting at $1.99
Pumpkin Seeds - Caspersmall size packet type seed packaging for - Pumpkin Casper
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Heirloom
Pumpkin Seeds - Casper
Starting at $2.99
Bean Seeds - Bush - Gold Rush Waxsmall size packet type seed packaging for - Bean Bush Gold Rush Wax
-0
Heirloom
Bean Seeds - Bush - Gold Rush Wax
Starting at $2.99
Tomato Seeds - Slicing - Brandywine Yellow (Organic)small size packet type seed packaging for - Tomato Slicing Brandywine Yellow Organic
-0
Heirloom
Organic
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$4.09
Tomato Seeds - Cherry - Large Red Cherry (Organic)mid size pouch type seed packaging for - Tomato Cherry Large Red Cherry Organic
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Heirloom
Organic
Tomato Seeds - Cherry - Large Red Cherry (Organic)
Starting at $4.89
Eggplant Seeds - Millionaire Purple Hybridmid size pouch type seed packaging for - Zinnia Magellan Series Orange
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Eggplant Seeds - Millionaire Purple Hybrid
Starting at $4.30
Moonflower Seeds - Tall Night Floweringsmall size packet type seed packaging for - Moonflower Tall Night Flowering
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Moonflower Seeds - Tall Night Flowering
Starting at $3.09
Pepper Seeds - Sweet - Cubanellemid size pouch type seed packaging for - Pepper Sweet Cubanelle
-37%
Heirloom
Pepper Seeds - Sweet - Cubanelle
Starting at $1.99
Chinese Broccoli Seeds - Suiho - Hybridmid size pouch type seed packaging for - Chinese Broccoli Suiho Hybrid
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Chinese Broccoli Seeds - Suiho - Hybrid
Starting at $3.99
Tomato Seeds - Slicing - Ace 55 VFmid size pouch type seed packaging for - Tomato Slicing Ace 55 VF
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Tomato Seeds - Slicing - Ace 55 VF
Starting at $2.99
Basil Seeds - Thai Sweet Large Leafmid size pouch type seed packaging for - Basil Thai Sweet Large Leaf
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Basil Seeds - Thai Sweet Large Leaf
Starting at $3.99
Whole Oats (Organic) - Cover Crop SeedsWhole Oats (Organic) - Cover Crop Seeds
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Organic
Whole Oats (Organic) - Cover Crop Seeds
Starting at $7.20
Basil Seeds - Red Leaf Holy Basilmid size pouch type seed packaging for - Basil Red Leaf Holy Basil
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Basil Seeds - Red Leaf Holy Basil
Starting at $3.99
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
Melon Seeds - Charentaissmall size packet type seed packaging for - Melon Charentais
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Melon Seeds - Charentais
Starting at $5.09
Radish Seeds - SparklerRadish Seeds - Sparkler
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Starting at $2.99
No-Till Pollinator Friendly Cover Crop Mix (Organic)No-Till Pollinator Friendly Cover Crop Mix (Organic)
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Starting at $6.41
Snapdragon Seeds - Sonnet SeriesSnapdragon Seeds - Sonnet Series
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Snapdragon Seeds - Sonnet Series
Starting at $2.99
Collards Seeds - Championmid size pouch type seed packaging for - Collards Champion
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Collards Seeds - Champion
Starting at $2.99
Tomato Seeds - Slicing - Homesteadsmall size packet type seed packaging for - Tomato Slicing Homestead
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Tomato Seeds - Slicing - Homestead
Starting at $2.99
Chrysanthemum Greens Seeds - Oasismid size pouch type seed packaging for - Chrysanthemum Greens Oasis
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Chrysanthemum Greens Seeds - Oasis
Starting at $3.99
Winter Rye (Organic) - Bulk Grains & FoodsWinter Rye (Organic) - Bulk Grains & Foods
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Starting at $7.84
Marigold (Signata) Seeds - Gem SeriesMarigold (Signata) Seeds - Gem Series
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Marigold (Signata) Seeds - Gem Series
Starting at $3.69
Strawflower Seeds - Tall Double Mixmid size pouch type seed packaging for - Strawflower Tall Double Mix
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Starting at $2.99
Tomato Seeds - Paste - Amish Paste (Organic)
Starting at $3.79
Aster Seeds - Crego Giant Mixture
Starting at $2.99
Eggplant Seeds - Florida Market
Starting at $3.69
Lettuce Seeds - Jericho - Organic
Starting at $4.39
Tomato Seeds - Cherry - Black Cherry (Organic)
Starting at $3.59
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