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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Lettuce Leaf - Grand Rapids - Microgreens SeedsLettuce Leaf - Grand Rapids - Microgreens Seeds
-0
Heirloom
Lettuce Leaf - Grand Rapids - Microgreens Seeds
Starting at $5.00
Pea Seeds - Maple - Microgreens Seeds
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Heirloom
Pea Seeds - Maple - Microgreens Seeds
Starting at $4.25
True Micro Tray - ECO Compostable TraysTrue Micro Tray - ECO Compostable Trays
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True Micro Tray - ECO Compostable Trays
Starting at $23.39
Mustard - Mizuna Lime Streaks - Microgreen SeedsMustard - Mizuna Lime Streaks - Microgreen Seeds
-0
Heirloom
Mustard - Mizuna Lime Streaks - Microgreen Seeds
Starting at $8.20
Minute Soil Grow CubeMinute Soil Plus Cube 3 Pack
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Minute Soil+ Cube - Amended Compressed Coco Coir
Starting at $6.99
Pea - Lincoln - Microgreens SeedsPea - Lincoln - Microgreens Seeds
-0
Heirloom
Staff Favorite
Pea - Lincoln - Microgreens Seeds
Starting at $9.57
Max Water RetentionMinute Soil+ - Max Water Retention Mix
-0
Minute Soil+ - Max Water Retention Mix
Starting at $22.19
Orach Microgreens Seeds (French Spinach) - Red FireOrach Microgreens Seeds (French Spinach) - Red Fire
-0
Heirloom
Orach Microgreens Seeds (French Spinach) - Red Fire
Starting at $11.77
Endive - Green Curled Ruffec - Microgreens Seedsmid size pouch type seed packaging for - Endive Green Curled Ruffec Microgreens
-0
Heirloom
Endive - Green Curled Ruffec - Microgreens Seeds
Starting at $6.79
custom packaging for Ecotone - Hydroponic Grow MatsEcotone - Hydroponic Grow Mats
-0
Staff Favorite
Ecotone - Hydroponic Grow Mats
Starting at $15.74
Broccoli Seeds - Ramoso Santana - MicrogreensBroccoli Seeds - Ramoso Santana - Microgreens
-0
Heirloom
Broccoli Seeds - Ramoso Santana - Microgreens
Starting at $6.65
Salad Burnet Herb Seeds - MicrogreensSalad Burnet Herb Seeds - Microgreens
-0
Heirloom
Salad Burnet Herb Seeds - Microgreens
Starting at $4.26
Basil Seeds - Cinnamon (Organic)
-44%
Heirloom
Organic
Basil Seeds - Cinnamon (Organic)
Starting at $1.99
Book: Wheatgrass Sprouts Microgreens and The Living Food Diet
-0
Book: Wheatgrass Sprouts Microgreens and The Living Food Diet
$12.11
Amaranth Seeds - All Red Leaf - Microgreens Seedsmid size pouch type seed packaging for - Amaranth All Red Leaf Microgreens
-0
Amaranth Seeds - All Red Leaf - Microgreens Seeds
Starting at $9.76
Radish - Red Daikon (Ostergruss Rosa) - Microgreens SeedsRadish - Red Daikon (Ostergruss Rosa) - Microgreens Seeds
-0
Heirloom
Radish - Red Daikon (Ostergruss Rosa) - Microgreens Seeds
Starting at $8.49
Lettuce Leaf - Ruby Red - Microgreens SeedsLettuce Leaf - Ruby Red - Microgreens Seeds
-0
Heirloom
Lettuce Leaf - Ruby Red - Microgreens Seeds
Starting at $10.34
Shiso Herb (Perilla) - Korean - Microgreens Seeds
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Heirloom
Shiso Herb (Perilla) - Korean - Microgreens Seeds
Starting at $14.34
Lovage Seeds - MicrogreensLovage Seeds - Microgreens
-9%
Heirloom
Lovage Seeds - Microgreens
Starting at $5.96
Borage Seeds (Organic) - Microgreens Seedsmid size pouch type seed packaging for - Tomato Slicing Yellow Perfection Organic
-0
Organic
Borage Seeds (Organic) - Microgreens Seeds
Starting at $5.03
Mustard Seeds - Greenwave - MicrogreensMustard Seeds - Greenwave - Microgreens
-0
AAS Winner
Heirloom
Mustard Seeds - Greenwave - Microgreens
Starting at $6.00
Lettuce Crisphead - Hanson Improved - Microgreens SeedsLettuce Crisphead - Hanson Improved - Microgreens Seeds
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Heirloom
Lettuce Crisphead - Hanson Improved - Microgreens Seeds
Starting at $6.46
Lettuce Leaf - Salad Bowl Red - Microgreens SeedsLettuce Leaf - Salad Bowl Red - Microgreens Seeds
-0
Heirloom
Lettuce Leaf - Salad Bowl Red - Microgreens Seeds
Starting at $7.81
Cauliflower - Igloo - MicrogreensCauliflower - Igloo - Microgreens
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Heirloom
Cauliflower - Igloo - Microgreens
Starting at $6.13
Radish Seeds - Pink Summercicle - Microgreenssmall size packet type seed packaging for - Radish Pink Summercicle Microgreens
-0
Heirloom
Radish Seeds - Pink Summercicle - Microgreens
Starting at $14.11
Fennel - Sweet - Microgreens SeedsFennel - Sweet - Microgreens Seeds
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Heirloom
Fennel - Sweet - Microgreens Seeds
Starting at $5.70
Fennel - Bronze - Microgreens Seeds
Starting at $13.25
Nasturtium Microgreens (Organic)
Starting at $15.75
Swiss Chard Seeds - Yellow - Organic - Microgreens
Starting at $6.12
Basil Seeds - Dwarf Greek (Organic)
Starting at $3.99
pH Down - 1 Quart by General Hydroponics
$15.59
Nasturtium Seeds - Empress of India (Organic)
Starting at $3.59
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