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
2750 Items
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Pepper Seeds - Sweet - Red Cherry Sweetmid size pouch type seed packaging for - Pepper Sweet Red Cherry Sweet
-33%
Heirloom
Pepper Seeds - Sweet - Red Cherry Sweet
Starting at $1.99
Pepper Seeds - Sweet - Sunset Italian Mix (Organic)small size packet type seed packaging for - Pepper Sweet Sunset Italian Mix Organic
-0
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Pepper Seeds - Sweet - Sunset Italian Mix (Organic)
Starting at $4.19
Pumpkin Seeds - Jack Be Little
-44%
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Pumpkin Seeds - Jack Be Little
Starting at $1.99
Petunia Seeds - Daddy Series (Pelleted)Petunia Seeds - Daddy Series (Pelleted)
-0
Petunia Seeds - Daddy Series (Pelleted)
Starting at $3.09
Tomato Seeds - Cherry - Sweetiemid size pouch type seed packaging for - Tomato Cherry Sweetie
-0
Heirloom
Tomato Seeds - Cherry - Sweetie
Starting at $3.39
Cucumber Seeds - Marketmore 76 (Organic)small size packet type seed packaging for - Cucumber Marketmore 76 Organic
-0
Heirloom
Organic
Cucumber Seeds - Marketmore 76 (Organic)
Starting at $3.59
Pepper Seeds - Sweet - Keystone Resistant Giantmid size pouch type seed packaging for - Pepper Sweet Keystone Resistant Giant
-0
Heirloom
Pepper Seeds - Sweet - Keystone Resistant Giant
Starting at $2.99
Corn Seeds - Sweet - (su) Early Sunglow Hybridmid size pouch type seed packaging for - Corn Sweet su Early Sunglow Hybrid
-0
Corn Seeds - Sweet - (su) Early Sunglow Hybrid
Starting at $4.29
Zinnia Seeds - Pumila Pompon
-0
Heirloom
Zinnia Seeds - Pumila Pompon
Starting at $3.39
Oats - Whole (Organic) - Grass SeedsOats - Whole (Organic) - Grass Seeds
-0
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Oats - Whole (Organic) - Grass Seeds
Starting at $7.20
Pepper Seeds - Sweet - Pepperoncini Italiansmall size packet type seed packaging for - Pepper Sweet Pepperoncini Italian
-44%
Heirloom
Pepper Seeds - Sweet - Pepperoncini Italian
Starting at $1.99
Tomato Seeds - Slicing - Red Ponderosa Beefsteak (Organic)small size packet type seed packaging for - Tomato Slicing Red Ponderosa Beefsteak Organic
-0
Heirloom
Organic
Tomato Seeds - Slicing - Red Ponderosa Beefsteak (Organic)
Starting at $3.79
Kohlrabi Seeds - Early White ViennaKohlrabi Seeds - Early White Vienna
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Kohlrabi Seeds - Early White Vienna
Starting at $2.99
Thai Basil Seeds - Siam Queen
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Thai Basil Seeds - Siam Queen
Starting at $1.99
Soybean - Yellow (Organic) - Sprouting Seedssmall size packet type seed packaging for - Soybean Yellow Organic Sprouting
-0
Organic
Soybean - Yellow (Organic) - Sprouting Seeds
Starting at $3.59
Sweet Marjoram SeedsSweet Marjoram Seeds
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Sweet Marjoram Seeds
Starting at $2.99
seed starter kit culinary BoxSeed Starter Kit Mexican Salsa
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Seed Starter Kit - Culinary Herb
Starting at $19.17
Pea Seeds - Snow - Mammoth Melting Sugar Podmid size pouch type seed packaging for - Pea Snow Mammoth Melting Sugar Pod
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Pea Seeds - Snow - Mammoth Melting Sugar Pod
Starting at $3.39
Cabbage Seeds - Mammoth Red Rocksmall size packet type seed packaging for - Cabbage Mammoth Red Rock
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Cabbage Seeds - Mammoth Red Rock
Starting at $2.99
Statice Seeds - QIS SeriesStatice Seeds - QIS Series
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Cucumber Seeds - Homemade Pickles (Organic)small size packet type seed packaging for - Cucumber Homemade Pickles Organic
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Starting at $3.59
Corn Seeds - Sweet - Serendipity Bicolor TripleSweet Hybridmid size pouch type seed packaging for - Corn Sweet Serendipity Bicolor TripleSweet Hybrid
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Corn Seeds - Sweet - Serendipity Bicolor TripleSweet Hybrid
Starting at $5.79
Anise Seedsmid size pouch type seed packaging for - Anise
-0
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Anise Seeds
Starting at $2.99
Pepper - Sweet - Lilac Bellmid size pouch type seed packaging for - Pepper Sweet Lilac Bell
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Pepper - Sweet - Lilac Bell
Starting at $2.99
Onion Seeds - Short - Red Burgundymid size pouch type seed packaging for - Onion Short Red Burgundy
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Onion Seeds - Short - Red Burgundy
Starting at $2.99
Lettuce Seeds - Leaf - Red Sailsmid size pouch type seed packaging for - Lettuce Leaf Red Sails
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Lettuce Seeds - Leaf - Red Sails
Starting at $2.99
Cabbage Seeds - Red Acre (Organic)
Starting at $3.69
Okra Seeds - Clemson Spineless (Organic)
Starting at $3.59
Kale Seeds - White Russian
Starting at $2.99
Pak Choi Seeds - White Stem - Organic
Starting at $3.99
Squash Seeds - Summer - Zucchini, Endurance BC, F1
Starting at $3.99
African Marigold Seeds - Cracker Jack
Starting at $2.99
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