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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Leaf Radish Seeds - Saisai Purple - Hybridmid size pouch type seed packaging for - Leaf Radish Saisai Purple Hybrid
-0
Leaf Radish Seeds - Saisai Purple - Hybrid
Starting at $3.99
Lettuce Seeds - Leaf - Lollo Rosso (Organic) - Clearance Seedsmid size pouch type seed packaging for - Lettuce Leaf Lollo Rosso Organic Clearance
-59%
Heirloom
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Lettuce Seeds - Leaf - Lollo Rosso (Organic) - Clearance...
Starting at $26.25
Anemone Bulbs - Carmel Bordeaux
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Anemone Bulbs - Carmel Bordeaux
Starting at $29.99
Pepper Seeds - Sweet - Pretty N Red Hybridmid size pouch type seed packaging for - Pepper Sweet Pretty N Red Hybrid
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Pepper Seeds - Sweet - Pretty N Red Hybrid
Starting at $4.99
Pepper Seeds - Hot - Tobago Seasoning
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Heirloom
Pepper Seeds - Hot - Tobago Seasoning
Starting at $5.09
Pepper Seeds - Hot - Jamaican Red
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Heirloom
Pepper Seeds - Hot - Jamaican Red
Starting at $3.09
Bean Seeds - Bush - Dark Red Kidney
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Heirloom
Bean Seeds - Bush - Dark Red Kidney
Starting at $2.79
Tomato Seeds - Salad - Variegated
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Tomato Seeds - Salad - Variegated
Starting at $3.69
Tomato Seeds - Slicing - Early Choice Black F1mid size pouch type seed packaging for - Zinnia Magellan Series Orange
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Tomato Seeds - Slicing - Early Choice Black F1
Starting at $4.39
Lettuce Seeds, Leaf - Selwaymid size pouch type seed packaging for - Lettuce Leaf Selway
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Heirloom
Lettuce Seeds, Leaf - Selway
Starting at $2.99
Tomato Seeds - Red Plumsmall size packet type seed packaging for - Tomato Red Plum
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Heirloom
Tomato Seeds - Red Plum
Starting at $2.99
Pepper Seeds - Sweet - Sweet Ristra F1mid size pouch type seed packaging for - Pepper Sweet Sweet Ristra F1
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Pepper Seeds - Sweet - Sweet Ristra F1
Starting at $4.99
Anemone Bulbs - Galilee Pastel Mix
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Anemone Bulbs - Galilee Pastel Mix
Starting at $29.99
Wildflower Seeds - Backyard Bird Lover's Mix
-42%
Wildflower Seeds - Backyard Bird Lover's Mix
Starting at $1.99
Poppy Seeds - Danish Flag
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Heirloom
Poppy Seeds - Danish Flag
Starting at $3.09
Peony Bulbs - Karl RosenfieldPeony Bulbs - Karl Rosenfield
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Peony Bulbs - Karl Rosenfield
Starting at $17.99
Bean Seeds - Bush - Red Swan
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Bean Seeds - Bush - Red Swan
Starting at $3.29
Tulip Bulbs - Parrot - MixTulip Bulbs - Parrot - Mix
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Tulip Bulbs - Parrot - Mix
Starting at $18.99
Tomato Seeds - Slicing - Boxcar Willie (Organic)
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Starting at $3.89
Tulip Bulbs - Triumph - MixTulip Bulbs - Triumph - Mix
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Tulip Bulbs - Triumph - Mix
Starting at $17.99
Tomato Seeds - Federle
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Starting at $2.79
Pepper Seeds - Hot - Enchantment Hybridmid size pouch type seed packaging for - Pepper Hot Enchantment Hybrid
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Pepper Seeds - Hot - Enchantment Hybrid
Starting at $4.99
Tomato Seeds - Salad - Red Zebramid size pouch type seed packaging for - Zinnia Magellan Series Orange
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Heirloom
Tomato Seeds - Salad - Red Zebra
Starting at $3.29
Pepper Seeds - Sweet - Sweet Rain Hybridmid size pouch type seed packaging for - Pepper Sweet Sweet Rain Hybrid
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Pepper Seeds - Sweet - Sweet Rain Hybrid
Starting at $3.99
Sunflower Seeds - Velvet Queen (Organic)
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Sunflower Seeds - Velvet Queen (Organic)
Starting at $3.89
Amaranthus Seeds - Splendens Perfecta TricolorAmaranthus Seeds - Splendens Perfecta Tricolor
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Amaranthus Seeds - Splendens Perfecta Tricolor
Starting at $2.89
Lily Bulbs - Asiatic - Red County
$6.25 $12.49
Boysenberry Roots
$18.99
Bean Seeds - Pole - Akahana Mame
Starting at $3.99
Pepper Seeds - Hot - Habanero Caribbean Red - Clearance...
Starting at $5.00
Lettuce Seeds, Leaf - Red Tango
Starting at $2.99
Begonia Tubers - Odorata - Red Glory
$7.50 $14.99
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