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
231 Items
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Squash Seeds - Winter - Autumn Acorn Blendsmall size packet type seed packaging for - Squash Winter Autumn Acorn Blend
-0
Heirloom
Squash Seeds - Winter - Autumn Acorn Blend
Starting at $3.09
Wildflower Seeds - Southwest MixWildflower Seeds - Southwest Mix
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Wildflower Seeds - Southwest Mix
Starting at $3.99
Iberis (Candytuft) Empress mid size pouch type seed packaging for - Iberis Candytuft Empress Mixture
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Iberis (Candytuft) Seeds - Empress
Starting at $2.99
Campanula Seeds - Cup & Saucer Mixturemid size pouch type seed packaging for - Campanula Cup & Saucer Mixture
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Campanula Seeds - Cup & Saucer Mixture
Starting at $2.99
Wildflower Seeds - Northeast MixWildflower Seeds - Northeast Mix
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Wildflower Seeds - Northeast Mix
Starting at $3.99
Radish Seeds - Crayon Colors Mixmid size pouch type seed packaging for - Radish Crayon Colors Mix
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Heirloom
Radish Seeds - Crayon Colors Mix
Starting at $2.99
Iberis Candytuft Dwarf Fairy MixtureIberis Candytuft Dwarf Fairy Mixture
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Iberis (Candytuft) Seeds - Dwarf Fairy Mixture
Starting at $2.99
Basil Seeds - Culinary Blend (Organic)small size packet type seed packaging for - Basil Culinary Blend Organic
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Heirloom
Organic
Basil Seeds - Culinary Blend (Organic)
Starting at $3.59
Gourd Seeds - Monster Mix F1mid size pouch type seed packaging for - Gourd Monster Mix F1
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Gourd Seeds - Monster Mix F1
Starting at $3.99
Brachycome Seeds - Splendor Mixmid size pouch type seed packaging for - Brachycome Splendor Mix
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Brachycome Seeds - Splendor Mix
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Corn Seeds - Popcorn - Glass Gem (Organic)mid size pouch type seed packaging for - Tomato Slicing Yellow Perfection Organic
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Organic
Corn Seeds - Popcorn - Glass Gem (Organic)
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Carrot Seeds - Culinary Blendsmall size packet type seed packaging for - Carrot Culinary Blend
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Carrot Seeds - Culinary Blend
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Dimorphotheca Seeds - Mixed Colorsmid size pouch type seed packaging for - Dimorphotheca Mixed Colors
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Heirloom
Dimorphotheca Seeds - Mixed Colors
Starting at $2.99
Lettuce Seeds - Butterhead & Bibb MixLettuce Seeds - Butterhead & Bibb Mix
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Lettuce Seeds - Butterhead & Bibb Mix
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Squash Seeds - Summer - Scallop Mixed Colors Hybridsmall size packet type seed packaging for - Squash Summer Scallop Mixed Colors Hybrid
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Squash Seeds - Summer - Scallop Mixed Colors Hybrid
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Basil Seeds - Ornamental Mixturesmall size packet type seed packaging for - Basil Ornamental Mixture
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Heirloom
Basil Seeds - Ornamental Mixture
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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)
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Wildflower Seeds - Everything Is In The MixWildflower Seeds - Everything Is In The Mix
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Starting at $3.69
Squash Seeds - Summer - Summer Melody Blendmid size pouch type seed packaging for - Squash Summer Summer Melody Blend
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Starting at $2.99
Pepper Seeds - Hot - Habanero Blend
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Starting at $3.09
Linaria Seeds - Spurred SnapdragonLinaria Seeds - Spurred Snapdragon
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Starting at $2.99
Sweet William Seeds - Wee Williemid size pouch type seed packaging for - Sweet William Wee Willie
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Starting at $2.99
Parsley Seeds - Garden Blendsmall size packet type seed packaging for - Parsley Garden Blend
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Heirloom
Parsley Seeds - Garden Blend
Starting at $2.99
Radish Seeds - Confetti Mixsmall size packet type seed packaging for - Radish Confetti Mix
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Radish Seeds - Confetti Mix
Starting at $2.99
Geranium Seeds - Tornado Series Mix
Starting at $8.15
Lettuce Seeds - Butterhead & Bibb Mix (Organic)
Starting at $3.59
Squash Seeds - Winter - Winter Harvest Blend
Starting at $2.99
Radish Seeds - Crayon Colors Mix - Microgreens
Starting at $6.52
Bean Seeds - Bush - Mardi Gras Mix (Organic)
Starting at $3.69
Mixed Greens - Braising Mix (Organic)
Starting at $3.59
Parsley Seeds - Kitchen Garden Blend (Organic)
Starting at $3.59
Marigold Seeds - African - Cracker Jack Mix (Organic) -...
Starting at $4.19
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