June is the heart of the planting season in cold-winter zones, but it carries a double assignment. The main job is getting every warm-season crop established outdoors. The secondary job — easy to miss — is starting the first wave of fall crops indoors. Leeks, pansies, and violas all have long enough lead times that, if you want them before the October frost, you should sow the seeds now.

Indoors (fresh harvests):

  • Microgreens: peas, broccoli, sunflowers, arugula
  • Sprouts: alfalfa, broccoli, radish, mung
  • Herbs & greens under lights: chives, parsley, mint

Start indoors now for fall: leek, pansy, viola

Transplants to move outdoors (harden first): tomato, pepper, eggplant, basil, sweet potato slips — get anything still waiting indoors out now.

Crops that can be directly sown outdoors in June: beans, corn, cucumber, squash, melons, okra, sunflower, basil, dill, beets, carrots, chard, and nasturtium. Succession-sow radishes and salad greens early in the month while temperatures are still moderate.

Cover crops: buckwheat, cowpeas, red clover — good for any gaps or unplanted beds

Tip: This zone group covers a lot of territory. Nothing replaces talking with experienced gardeners in your area and, of course, watching the weather closely.

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
632 Items
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Squash Seeds - Summer - Vegetable Marrow White Bushsmall size packet type seed packaging for - Squash Summer Vegetable Marrow White Bush
-0
Heirloom
Squash Seeds - Summer - Vegetable Marrow White Bush
Starting at $2.99
Squash Seeds - Japanese, Winter - Blue Kurimid size pouch type seed packaging for - Squash Japanese Winter Blue Kuri
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Squash Seeds - Japanese, Winter - Blue Kuri
Starting at $3.99
Carrot Seeds - Lunar Whitemid size pouch type seed packaging for - Carrot Lunar White
-33%
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Carrot Seeds - Lunar White
Starting at $1.99
Squash Seeds - Korean, Summer - Teot Bat Put - Hybrid
-0
Squash Seeds - Korean, Summer - Teot Bat Put -...
Starting at $3.99
Squash Seeds - Winter - Gold Nuggetsmall size packet type seed packaging for - Squash Winter Gold Nugget
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AAS Winner
Heirloom
Squash Seeds - Winter - Gold Nugget
Starting at $4.19
Squash Seeds - Winter - Green HubbardSquash Seeds - Winter - Green Hubbard
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Heirloom
Squash Seeds - Winter - Green Hubbard
Starting at $2.99
Watermelon Seeds - Giant - Florida Giantsmall size packet type seed packaging for - Watermelon Giant Florida Giant
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Watermelon Seeds - Giant - Florida Giant
Starting at $2.99
Melon Seeds - Cantaloupe - Ball 2076 HybridMelon Seeds - Cantaloupe - Ball 2076 Hybrid
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Melon Seeds - Cantaloupe - Ball 2076 Hybrid
Starting at $6.09
Melon Seeds - Cantaloupe - Tuscanysmall size packet type seed packaging for - Melon Cantaloupe Tuscany
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Heirloom
Melon Seeds - Cantaloupe - Tuscany
Starting at $2.99
Squash Seeds - Winter - Honeynut (Organic)mid size pouch type seed packaging for - Squash Winter Honeynut Organic
-0
Organic
Squash Seeds - Winter - Honeynut (Organic)
Starting at $3.89
Watermelon Seeds - Picnic - Golden Honeymid size pouch type seed packaging for - Watermelon Picnic Golden Honey
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Heirloom
Watermelon Seeds - Picnic - Golden Honey
Starting at $3.09
Squash Seeds - Chirimensmall size packet type seed packaging for - Squash Chirimen
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Heirloom
Squash Seeds - Chirimen
Starting at $3.99
Beet Seeds - Early Wonder - Organicsmall size packet type seed packaging for - Beet Early Wonder Organic
-0
Heirloom
Organic
Beet Seeds - Early Wonder - Organic
Starting at $3.59
Squash Seeds - Dark Green Zucchinismall size packet type seed packaging for - Squash Dark Green Zucchini
-31%
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Squash Seeds - Dark Green Zucchini
Starting at $1.99
Carrot Seeds - Yellowsmall size packet type seed packaging for - Carrot Yellow
-39%
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Carrot Seeds - Yellow
Starting at $1.99
Carrot Seeds - Autumn King / FlakkeeCarrot Seeds - Autumn King / Flakkee
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Carrot Seeds - Autumn King / Flakkee
Starting at $2.99
Radish, Daikon (Organic) - Vegetable SeedsRadish, Daikon (Organic) - Vegetable Seeds
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Heirloom
Organic
Radish, Daikon (Organic) - Vegetable Seeds
Starting at $7.85
Squash Seeds - Winter - Marina Di Chioggiasmall size packet type seed packaging for - Squash Winter Marina Di Chioggia
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Heirloom
Squash Seeds - Winter - Marina Di Chioggia
Starting at $3.39
Corn Seeds - Dent - Lancaster Sure Cropsmall size packet type seed packaging for - Corn Dent Lancaster Sure Crop
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Heirloom
Corn Seeds - Dent - Lancaster Sure Crop
Starting at $2.63
Corn Seeds - Sweet - Bodacious Hybrid R/M (treated)mid size pouch type seed packaging for - Corn Sweet Bodacious Hybrid R/M treated
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Corn Seeds - Sweet - Bodacious Hybrid R/M (treated)
Starting at $12.53
Squash Seeds - Winter - Pink Banana Jumbo (Organic)
-0
Heirloom
Organic
Squash Seeds - Winter - Pink Banana Jumbo (Organic)
Starting at $3.59
Squash Seeds - Tatumemid size pouch type seed packaging for - Squash Tatume
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Squash Seeds - Tatume
Starting at $2.99
Melon Seeds - Cantaloupe - Planters Jumbomid size pouch type seed packaging for - Melon Cantaloupe Planters Jumbo
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Melon Seeds - Cantaloupe - Planters Jumbo
Starting at $2.99
Squash Seeds - Summer - Scallop Jaune et Vertesmall size packet type seed packaging for - Squash Summer Scallop Jaune et Verte
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Squash Seeds - Summer - Scallop Jaune et Verte
Starting at $2.99
Watermelon Seeds - Giant - Black Diamond Yellow BellyWatermelon Seeds - Giant - Black Diamond Yellow Belly
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Starting at $2.99
Beet Seeds - White Albinosmall size packet type seed packaging for - Beet White Albino
-28%
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Starting at $1.99
Melon Seeds - Honeydew - Earli-Dew HybridMelon Seeds - Honeydew - Earli-Dew Hybrid
-0
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Starting at $7.49
Corn Seeds - Sweet - Incredible Hybrid R/M (treated)mid size pouch type seed packaging for - Corn Sweet Incredible Hybrid R/M treated
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Corn Seeds - Sweet - Incredible Hybrid R/M (treated)
Starting at $15.18
Squash Seeds - Ebony Acorn
Starting at $2.99
Squash Seeds - Winter - Tahitian (Organic)
$4.79
Squash Seeds - Winter - Winter Harvest Blend (Organic)
Starting at $3.89
Melon Seeds - Cantaloupe - Honey Rock (Organic)
Starting at $3.59
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