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
169 Items
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Mustard - Tatsoi - Microgreens SeedsMustard - Tatsoi - Microgreens Seeds
-0
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Mustard - Tatsoi - Microgreens Seeds
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Marigold Microgreens Seeds - Minuta, Ediblemid size pouch type seed packaging for - Marigold Microgreens Minuta Edible
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Starting at $2.99
Pea - Early Frosty - Microgreens SeedsPea - Early Frosty - Microgreens Seeds
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Lettuce, Romaine - Little Gem - Microgreens SeedsLettuce, Romaine - Little Gem - Microgreens Seeds
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Lettuce, Romaine - Little Gem - Microgreens Seeds
Starting at $6.95
Lettuce Leaf - Lollo Rosso (Organic) - Microgreens SeedsLettuce Leaf - Lollo Rosso (Organic) - Microgreens Seeds
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Organic
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Lettuce Leaf - Lollo Rosso (Organic) - Microgreens Seeds
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Lettuce Gourmet Mix (Organic) - Microgreens SeedsLettuce Gourmet Mix (Organic) - Microgreens Seeds
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Starting at $11.34
Lettuce - Waldmanns Green - Microgreens SeedsLettuce - Waldmanns Green - Microgreens Seeds
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Starting at $2.99
Pea - Little Marvel - Microgreens SeedsPea - Little Marvel - Microgreens Seeds
-0
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Starting at $11.48
Radish - Red Stem - Microgreens SeedsRadish - Red Stem - Microgreens Seeds
-0
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Mustard - Mizuna Red Streaks (Organic) - Microgreens SeedsMustard - Mizuna Red Streaks (Organic) - Microgreens Seeds
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Mustard - Mizuna Red Streaks (Organic) - Microgreens Seeds
Starting at $12.23
Leek Seeds - Carentan - MicrogreensLeek Seeds - Carentan - Microgreens
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Starting at $5.75
Colorful Mustard Microgreens Seed MixColorful Mustard Microgreens Seed Mix
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Starting at $6.27
Basil - Genovese (Organic) - Microgreens SeedsBasil - Genovese (Organic) - Microgreens Seeds
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Kale Microgreens Seeds (Organic)mid size pouch type seed packaging for - Kale Microgreens Organic
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Starting at $15.75
Colorful Basil Microgreens Seed MixColorful Basil Microgreens Seed Mix
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Lettuce Leaf - Salad Bowl Green - Microgreens SeedsLettuce Leaf - Salad Bowl Green - Microgreens Seeds
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Pea Seeds - Afila Tendril - Microgreens (Organic)
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Starting at $3.81
Onion - Red Burgundy - Microgreens SeedsOnion - Red Burgundy - Microgreens Seeds
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Green Mustard Microgreens SeedsGreen Mustard Microgreens Seeds
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Starting at $4.65
Nasturtium - Whirlybird Mix - Microgreens SeedsNasturtium - Whirlybird Mix - Microgreens Seeds
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Starting at $8.49
Mustard - Tokyo Bekana - Microgreens SeedsMustard - Tokyo Bekana - Microgreens Seeds
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Starting at $6.32
Lettuce - Parris Island Cos - Microgreens SeedsLettuce - Parris Island Cos - Microgreens Seeds
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Onion - White Sweet Spanish - Microgreens SeedsOnion - White Sweet Spanish - Microgreens Seeds
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Green Cabbage Microgreens SeedsGreen Cabbage Microgreens Seeds
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Seed Assortment: Colorful MicrogreensSeed Assortment: Colorful Microgreens
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Mustard - Red Giant - Microgreens SeedsMustard - Red Giant - Microgreens Seeds
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Amaranth Seeds - Red Army - Microgreens Seeds
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Kale Seeds - White Russian - Microgreens
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Swiss Chard Seeds - Yellow - Microgreens
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Lettuce Crisphead - Iceberg - Microgreens Seeds
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Organic Green Cabbage Microgreens Seeds
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Orach - Purple - Microgreens Seeds
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