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
696 Items
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Bean Seeds - Bush - Shinonome Soybean - Clearance Seeds
-43%
Heirloom
Bean Seeds - Bush - Shinonome Soybean - Clearance Seeds
Starting at $21.00
Carrying Tray Insert - Fits 5 Inch Square PotsCarrying Tray Insert - Fits 5 Inch Square Pots
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Carrying Tray Insert - Fits 5 Inch Square Pots
$4.99
Fermenting Crock Pot - K&K Keramik Garopf
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Fermenting Crock Pot - K&K Keramik Garopf
Starting at $133.00
Raised Garden Bed With Greenhouse ClocheRaised Garden Bed With Greenhouse Cloche
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Raised Garden Bed With Greenhouse Cloche
$78.95
Sunflower Seeds - Velvet Queen (Organic)
-0
Heirloom
Organic
Sunflower Seeds - Velvet Queen (Organic)
Starting at $3.89
Lettuce Seeds - Leaf - Lollo Rosso (Organic) - Clearance Seeds
-72%
Heirloom
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Lettuce Seeds - Leaf - Lollo Rosso (Organic) - Clearance...
Starting at $20.00
Cotton Lint - Erlene's GreenCotton Lint - Erlene's Green
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Cotton Lint - Erlene's Green
$3.74
Package of Soil Revival on a wooden backgroundSoil Revival - Black Soldier Fly Insect Frass Fertilizer (Organic)
-0
Organic
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Starting at $16.00
Plastic Nursery Pots - 5 Inch Square and Carrying Tray InsertPlastic Nursery Pots - 5 Inch Square and Carrying Tray Insert
-0
Plastic Nursery Pots - 5 Inch Square and Carrying Tray...
$20.39
Pepper Seeds - Sweet - Gold Horn Hybrid
-0
Pepper Seeds - Sweet - Gold Horn Hybrid
Starting at $4.09
Tomato Seeds - Brandymaster Yellow F1 Hybrid - Clearance Seeds
-92%
Tomato Seeds - Brandymaster Yellow F1 Hybrid - Clearance Seeds
Starting at $29.15
Amaranthus Seeds - Splendens Perfecta TricolorAmaranthus Seeds - Splendens Perfecta Tricolor
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Amaranthus Seeds - Splendens Perfecta Tricolor
Starting at $2.89
Amaryllis Bulbs - 24/26 - Fantastica
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Amaryllis Bulbs - 24/26 - Fantastica
$22.90
Bag packaging for Prime2Bud Booster by Mighty Plant, contact customer service at 801-491-8700 for instructions helpBack Bag Packaging contact customer service at 801-491-8700 for instructions help
-0
Prime2Bud™ Booster by Mighty Plant
$16.00
Person holding a set of seed packets seed packets surrounded by green leafy vegetables on a white background
-0
Staff Favorite
Seed Assortment - 8 Variety Heat Tolerant Greens Collection
$12.47
'Boomr Bin' Mushroom Monotub'Boomr Bin' Mushroom Monotub
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'Boomr Bin' Mushroom Monotub
$29.99
Amaryllis Bulbs - 24/26 - Laforest Morton
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Amaryllis Bulbs - 24/26 - Laforest Morton
$27.99
Folding Saw - Garden Hand Tools
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$14.95
Fruit Clippers - Garden Hand ToolsFruit Clippers - Garden Hand Tools
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3"x5" Double-Sided Yellow Sticky Card Insect Trap3"x5" Double-Sided Yellow Sticky Card Insect Trap
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Dried Wild Chanterelle MushroomsDried Wild Chanterelle Mushrooms
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$12.50
Pea Seeds - Snap - Sugar Lace II
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Pumpkin Seeds - Cherokee Bush - Clearance Seeds
Starting at $10.00
Garden Themed Board Game - Three Sisters
$29.95
Lettuce Seeds - Butterhead - Capitaine - Clearance Seeds
Starting at $15.00
Tomato Seeds - Slicing - Oxheart Orange
Starting at $2.99
Cabbage Shredder - K&K Keramik
$62.00
Container Garden Seed Assortment Kit - Easy to Grow 8...
Starting at $45.34
Caraway Seeds (Organic) - Clearance Seeds
Starting at $2.00
Bonide Captain Jack's Neem Oil - 32 oz Spray Bottle
$17.99
Parsley Seeds - Plain or Single (Organic) - Clearance Seeds
Starting at $3.00
Carrot Seeds - Little Finger - Clearance Seeds
Starting at $5.00
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