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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
377 Items
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Broccoli - Waltham 29 - Microgreens SeedsBroccoli - Waltham 29 - Microgreens Seeds
-0
Heirloom
Broccoli - Waltham 29 - Microgreens Seeds
Starting at $5.60
Pea Sprouting Speckled OrganicPea Sprouting Speckled Organic
-0
Heirloom
Organic
Pea - Speckled (Organic) - Microgreens Seeds
Starting at $3.59
Basic Salad Mix - Microgreens SeedsBasic Salad Mix - Microgreens Seeds
-0
Heirloom
Basic Salad Mix - Microgreens Seeds
Starting at $5.61
Sunflower - Black Oil - Microgreens SeedsSunflower - Black Oil - Microgreens Seeds
-0
Heirloom
Staff Favorite
Sunflower - Black Oil - Microgreens Seeds
Starting at $2.99
Spicy Salad Mix - Microgreens Seedsmid size pouch type seed packaging for - Spicy Salad Mix Microgreens
-0
Heirloom
Staff Favorite
Spicy Salad Mix - Microgreens Seeds
Starting at $5.61
10 x 20 Growing Trays WITHOUT Holes10 x 20 Growing Trays WITHOUT Holes
-0
10 x 20 Growing Trays WITHOUT Holes
Starting at $15.47
Arugula - Slow Bolt - Microgreens SeedsArugula - Slow Bolt - Microgreens Seeds
-4%
Heirloom
Arugula - Slow Bolt - Microgreens Seeds
Starting at $5.04
Kale - Red Russian - Microgreens SeedsKale - Red Russian - Microgreens Seeds
-0
Heirloom
Kale - Red Russian - Microgreens Seeds
Starting at $5.63
Amaranth - Red Garnet - Microgreens Seedsmid size pouch type seed packaging for - Amaranth Red Garnet Microgreens
-0
Heirloom
Amaranth - Red Garnet - Microgreens Seeds
Starting at $2.99
Pea - Dun - Microgreens SeedsPea - Dun - Microgreens Seeds
-0%
Heirloom
Pea - Dun - Microgreens Seeds
Starting at $7.73
10 x 20 Growing Trays WITH Drain Holes10 x 20 Growing Trays WITH Drain Holes
-0
10 x 20 Growing Trays WITH Drain Holes
Starting at $15.47
Radish Seeds - Microgreen - Daikon Minowase (Organic)Radish Seeds - Microgreen - Daikon Minowase (Organic)
-0
Heirloom
Organic
Radish Seeds - Microgreen - Daikon Minowase (Organic)
Starting at $7.85
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
Pea - Green (Organic) - Microgreens SeedsPea - Green (Organic) - Microgreens Seeds
-0
Heirloom
Organic
Pea - Green (Organic) - Microgreens Seeds
Starting at $9.08
Cilantro - Slow Bolt - Microgreens SeedsCilantro - Slow Bolt - Microgreens Seeds
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Staff Favorite
Cilantro - Slow Bolt - Microgreens Seeds
Starting at $4.86
Basil - Genovese - Microgreens SeedsBasil - Genovese - Microgreens Seeds
-22%
Heirloom
Basil - Genovese - Microgreens Seeds
Starting at $6.32
custom packaging for minute soil compressed coconut coir pucksMinute Soil - Compressed Coconut Coir Pucks (Organic)
-0
Minute Soil - Compressed Coconut Coir Pucks (Organic)
Starting at $10.38
custom box packaging for Mini Microgreens Growing Kits (Organic)Mini Microgreens Growing Kits (Organic)
-0
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Mini Microgreens Growing Kits (Organic)
Starting at $6.99
5 x 5 Small Growing Tray Inserts (with Drain Holes)5 x 5 Small Growing Tray Inserts (with Drain Holes)
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5 x 5 Small Growing Tray Inserts (with Drain Holes)
Starting at $6.06
Radish - China Rose (Conventional) - Microgreens SeedsRadish - China Rose (Conventional) - Microgreens Seeds
-0
Heirloom
Radish - China Rose (Conventional) - Microgreens Seeds
Starting at $3.99
10 x10 Growing Trays WITHOUT Drain Holes10 x10 Growing Trays WITHOUT Drain Holes
-0
10 x10 Growing Trays WITHOUT Drain Holes
Starting at $13.75
Swiss Chard - Ruby Red - Microgreens SeedsSwiss Chard - Ruby Red - Microgreens Seeds
-0
Heirloom
Swiss Chard - Ruby Red - Microgreens Seeds
Starting at $5.50
10 x10 Growing Trays WITH Drain Holes10 x10 Growing Trays WITH Drain Holes
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10 x10 Growing Trays WITH Drain Holes
Starting at $13.53
Kohlrabi - Purple Vienna - Microgreens SeedsKohlrabi - Purple Vienna - Microgreens Seeds
-0
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Kohlrabi - Purple Vienna - Microgreens Seeds
Starting at $6.86
Leek - Large American Flag - Microgreens SeedsLeek - Large American Flag - Microgreens Seeds
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Starting at $8.30
Carrot - Microgreens Seedsmid size pouch type seed packaging for - Carrot Microgreens
-0
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Carrot - Microgreens Seeds
Starting at $6.92
Nasturtium - Jewel Mix - Microgreens SeedsNasturtium - Jewel Mix - Microgreens Seeds
-2%
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Nasturtium - Jewel Mix - Microgreens Seeds
Starting at $5.78
Cilantro Seeds - Leisure Splits - Microgreens SeedsCilantro Seeds - Leisure Splits - Microgreens Seeds
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Heirloom
Staff Favorite
Cilantro Seeds - Leisure Splits - Microgreens Seeds
Starting at $5.61
Beet - Bulls Blood - Microgreens SeedsBeet - Bulls Blood - Microgreens Seeds
-10%
Heirloom
Beet - Bulls Blood - Microgreens Seeds
Starting at $5.85
Radish - Rambo (Organic) - Microgreens Seeds
Starting at $3.59
Cabbage - Red Acre - Microgreens Seeds
Starting at $5.94
Radish - Rambo - Microgreens Seeds
Starting at $2.99
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