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
376 Items
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Handy Pantry - Jute Fiber Hydroponic Grow Medium - RollHandy Pantry - Jute Fiber Hydroponic Grow Medium - Roll
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Lettuce - Waldmanns Green - Microgreens SeedsLettuce - Waldmanns Green - Microgreens Seeds
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Pea - Little Marvel - Microgreens SeedsPea - Little Marvel - Microgreens Seeds
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Radish - Red Stem - Microgreens SeedsRadish - Red Stem - Microgreens Seeds
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Micro Punnet Tray - MicrogreensMicro Punnet Tray - Microgreens
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Mustard - Mizuna Red Streaks (Organic) - Microgreens SeedsMustard - Mizuna Red Streaks (Organic) - Microgreens Seeds
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Mustard Seeds - Black Knight Tatsoi - Microgreen SeedsMustard Seeds - Black Knight Tatsoi - Microgreen Seeds
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Coco Coir Fiber - 10x20 Hydroponic Grow Mats
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Radish - Hong Vit - Microgreen SeedsRadish - Hong Vit - Microgreen Seeds
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Leek Seeds - Carentan - MicrogreensLeek Seeds - Carentan - Microgreens
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Lupine Seeds - Sweet Lupine - MoonshineLupine Seeds - Sweet Lupine - Moonshine
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Chrysanthemum Seeds - Broad Leaf, Edible - MicrogreensChrysanthemum Seeds - Broad Leaf, Edible - Microgreens
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Colorful Mustard Microgreens Seed MixColorful Mustard Microgreens Seed Mix
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Endive - Broadleaf Batavian - Microgreens SeedsEndive - Broadleaf Batavian - Microgreens Seeds
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1020 Clear Humidity Dome - Extra Strength1020 Clear Humidity Dome - Extra Strength
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Parsley Microgreens SeedsParsley Microgreens Seeds
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wide spectrum pH 4.0 to 8.5 Super-Concentraded, just 3 to 5 drops per test
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Tray Insert - 12 Cell TraysTray Insert - 12 Cell Trays
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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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Carrot - Lunar White - Microgreens Seedsmid size pouch type seed packaging for - Carrot Lunar White Microgreens
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Chinese Mahogany Seeds - Microgreenssmall size packet type seed packaging for - Chinese Mahogany Microgreens
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