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
430 Items
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Allium Bulbs - Mount Everest
-0
Allium Bulbs - Mount Everest
Starting at $22.90
Radish Tokinashi All SeasonRadish - Tokinashi All Season - Microgreens
-0
Heirloom
Radish - Tokinashi All Season - Microgreens
Starting at $7.26
Tomato Seeds - Salad - Variegated
-0
Tomato Seeds - Salad - Variegated
Starting at $3.69
Anemone Bulbs - Galilee Pastel Mix
-0
Anemone Bulbs - Galilee Pastel Mix
Starting at $29.99
Paperwhites Bulbs - 15/16 - Ziva
-0
Heirloom
Paperwhites Bulbs - 15/16 - Ziva
Starting at $26.99
Wildflower Seeds - Backyard Bird Lover's Mix
-42%
Wildflower Seeds - Backyard Bird Lover's Mix
Starting at $1.99
Tulip Bulbs - Darwin Hybrid - Ivory Floradale/Hakuun
-0
Tulip Bulbs - Darwin Hybrid - Ivory Floradale/Hakuun
Starting at $18.99
Poppy Seeds - Danish Flag
-0
Heirloom
Poppy Seeds - Danish Flag
Starting at $3.09
Easter Lily Bulbs - Miracle
-0
Easter Lily Bulbs - Miracle
$8.99
Radish Seeds - Giant Luo Buo - Microgreens Seeds
-0
Heirloom
Radish Seeds - Giant Luo Buo - Microgreens Seeds
Starting at $16.29
Cotton Lint - RajhansCotton Lint - Rajhans
-0
Cotton Lint - Rajhans
$3.74
Tulip Bulbs - Fringed - MixTulip Bulbs - Fringed - Mix
-0
Tulip Bulbs - Fringed - Mix
Starting at $18.99
Tulip Bulbs - Parrot - MixTulip Bulbs - Parrot - Mix
-0
Tulip Bulbs - Parrot - Mix
Starting at $18.99
Radish Seeds - Miyashige Green Neck - Microgreens Seeds
-0
Heirloom
Radish Seeds - Miyashige Green Neck - Microgreens Seeds
Starting at $7.26
Zinnia Seeds - Star SeriesZinnia Seeds - Star Series
-0
Zinnia Seeds - Star Series
Starting at $3.09
Tulip Bulbs - Triumph - MixTulip Bulbs - Triumph - Mix
-0
Tulip Bulbs - Triumph - Mix
Starting at $17.99
Radish Seeds - Wakayama White - Microgreens Seeds
-35%
Heirloom
Radish Seeds - Wakayama White - Microgreens Seeds
Starting at $7.69
Hyacinth Bulbs - Carnegie/Top White
-0
Hyacinth Bulbs - Carnegie/Top White
Starting at $13.99
Radish Seeds - Nerima - Microgreens
-0
Heirloom
Radish Seeds - Nerima - Microgreens
Starting at $19.03
Amaryllis Bulbs - 24/26 - Fantastica
-0
Amaryllis Bulbs - 24/26 - Fantastica
$22.90
Turnip Seeds - Sugukina - Microgreens Seeds
-0
Heirloom
Turnip Seeds - Sugukina - Microgreens Seeds
Starting at $14.24
Amaryllis Bulbs - 24/26 -  Maria Goretti
-0
Amaryllis Bulbs - 24/26 - Maria Goretti
$22.90
Turnip Seeds - Tennouji Kabura - Microgreens Seeds
-47%
Heirloom
Turnip Seeds - Tennouji Kabura - Microgreens Seeds
Starting at $8.00
Ranunculus Bulbs - Aviv Mix
$16.99
Begonia Tubers - Odorata - Angelique
$7.50 $14.99
Dahlia Bulbs - Cafe Au Lait
$22.99
Ranunculus Bulbs - Aviv Pastel Mix
$16.99
Lily Bulbs - Oriental - Sunny Bahamas
$6.25 $12.49
Caraway Seeds (Organic)
Starting at $3.59
Chamomile Seeds - German - Clearance Seeds
Starting at $8.13
Caraway Seeds (Organic) - Clearance Seeds
Starting at $2.00
Turnip Seeds - Sugukina - Clearance Seeds
Starting at $15.33
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