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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
359 Items
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Kale - Red Russian - Microgreens SeedsKale - Red Russian - Microgreens Seeds
-0
Heirloom
Kale - Red Russian - Microgreens Seeds
Starting at $5.63
Beet - Detroit Dark Red (Conventional) - Microgreens Seedsmid size pouch type seed packaging for - Beet Detroit Dark Red Conventional Microgreens
-0
Heirloom
Beet - Detroit Dark Red (Conventional) - Microgreens Seeds
Starting at $8.58
Lettuce Seeds - Mixed Greens - Gourmet MixtureLettuce Seeds - Mixed Greens - Gourmet Mixture
-0
Heirloom
Lettuce Seeds - Mixed Greens - Gourmet Mixture
Starting at $2.99
Radish - China Rose (Conventional) - Microgreens SeedsRadish - China Rose (Conventional) - Microgreens Seeds
-0
Heirloom
Radish - China Rose (Conventional) - Microgreens Seeds
Starting at $3.99
Kohlrabi - Purple Vienna - Microgreens SeedsKohlrabi - Purple Vienna - Microgreens Seeds
-0
Heirloom
Kohlrabi - Purple Vienna - Microgreens Seeds
Starting at $6.86
Turnip Seeds - Purple Top White GlobeTurnip Seeds - Purple Top White Globe
-0
Heirloom
Turnip Seeds - Purple Top White Globe
Starting at $2.99
Geranium Seeds - Maverick SeriesGeranium Maverick Series Star pink w rose eye
-0
Geranium Seeds - Maverick Series
Starting at $4.69
Lettuce Seeds - Mixed Greens - Mesclun MixLettuce Seeds - Mixed Greens - Mesclun Mix
-0
Heirloom
Lettuce Seeds - Mixed Greens - Mesclun Mix
Starting at $2.99
Beet - Bulls Blood - Microgreens SeedsBeet - Bulls Blood - Microgreens Seeds
-10%
Heirloom
Beet - Bulls Blood - Microgreens Seeds
Starting at $5.85
Lavender Seeds - Common English (aka Vera)Lavender Seeds - Common English (aka Vera)
-0
Staff Favorite
Lavender Seeds - Common English (aka Vera)
Starting at $2.99
Radish - Triton Purple - Microgreens SeedsRadish - Triton Purple - Microgreens Seeds
-0
Heirloom
Radish - Triton Purple - Microgreens Seeds
Starting at $2.99
Radish Seeds - Microgreen - Sango PurpleRadish Seeds - Microgreen - Sango Purple
-0
Heirloom
Staff Favorite
Radish Seeds - Microgreen - Sango Purple
Starting at $3.99
Cabbage Seeds - Red Acremid size pouch type seed packaging for - Cabbage Red Acre
-0
Heirloom
Cabbage Seeds - Red Acre
Starting at $2.99
Lettuce Seeds - Gourmet Mix (Organic)Lettuce Seeds - Gourmet Mix (Organic)
-0
Heirloom
Organic
Lettuce Seeds - Gourmet Mix (Organic)
Starting at $3.59
Radish - Purple - Microgreens SeedsRadish - Purple - Microgreens Seeds
-0
Heirloom
Radish - Purple - Microgreens Seeds
Starting at $7.28
Petunia Seeds - Easy Wave Series (pelleted)Petunia Seeds - Easy Wave Series (pelleted)
-0
Petunia Seeds - Easy Wave Series (pelleted)
Starting at $3.69
Kale Seeds - Red Russiansmall size packet type seed packaging for - Kale Red Russian
-0
Heirloom
Kale Seeds - Red Russian
Starting at $2.99
Echinacea - Purple Coneflower Seedsmid size pouch type seed packaging for - Echinacea Purple Coneflower
-0
Echinacea - Purple Coneflower Seeds
Starting at $2.99
Geranium Seeds - Pinto Premium SeriesGeranium Seeds - Pinto Premium Series
-0
AAS Winner
Geranium Seeds - Pinto Premium Series
Starting at $4.99
Viola Seeds - Sorbet SeriesViola Seeds - Sorbet Series
-0
Viola Seeds - Sorbet Series
Starting at $4.29
Petunia Seeds - Dreams Series (pelleted)Petunia Seeds - Dreams Series (pelleted)
-0
Petunia Seeds - Dreams Series (pelleted)
Starting at $2.99
Pepper Seeds - Sweet - Purple BeautyPepper Seeds - Sweet - Purple Beauty
-0
Heirloom
Pepper Seeds - Sweet - Purple Beauty
Starting at $2.99
Radish Seeds - Microgreen - Sango Purple (Organic)
-0
Heirloom
Organic
Staff Favorite
Radish Seeds - Microgreen - Sango Purple (Organic)
Starting at $3.99
Radish - Red Arrow - Microgreens SeedsRadish - Red Arrow - Microgreens Seeds
-0
Heirloom
Radish - Red Arrow - Microgreens Seeds
Starting at $7.24
Basil Seeds - ThaiBasil Seeds - Thai
-50%
Heirloom
Staff Favorite
Basil Seeds - Thai
Starting at $1.99
Radish - Rambo (Organic) - Microgreens Seeds
Starting at $3.59
Radish - Rambo - Microgreens Seeds
Starting at $2.99
Swiss Chard Seeds - Rainbow Mixture
Starting at $3.89
Swiss Chard Seeds - Rainbow Mixture (Organic)
Starting at $3.69
Lavender Seeds (Organic)
Starting at $3.59
Kohlrabi - Purple Vienna (Organic) - Microgreens Seeds
Starting at $9.51
Radish - China Rose (Organic) - Microgreens Seeds
Starting at $5.97
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