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
179 Items
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Radish Seeds - April Cross - Hybridmid size pouch type seed packaging for - Radish April Cross Hybrid
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Radish Seeds - April Cross - Hybrid
Starting at $3.99
Squash Seeds - Winter - Table Princess F1 PMTsmall size packet type seed packaging for - Squash Winter Table Princess F1 PMT
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Squash Seeds - Winter - Table Princess F1 PMT
Starting at $3.99
Radish Seeds - Korean - Altari Dochon 89 - Hybridmid size pouch type seed packaging for - Radish Korean Altari Dochon 89 Hybrid
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Radish Seeds - Korean - Altari Dochon 89 - Hybrid
Starting at $3.99
Radish Korean Sushiromid size pouch type seed packaging for - Radish Korean Sushiro Hybrid
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Radish Seeds - Korean - Sushiro - Hybrid
Starting at $3.99
Radish Seeds - White Cannon - Hybridmid size pouch type seed packaging for - Radish White Cannon Hybrid
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Radish Seeds - White Cannon - Hybrid
Starting at $3.99
Squash Seeds - Winter - Big Chief Hybridsmall size packet type seed packaging for - Squash Winter Big Chief Hybrid
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Squash Seeds - Winter - Big Chief Hybrid
Starting at $3.99
Squash Seeds - Summer - Golden Zebra F1small size packet type seed packaging for - Squash Summer Golden Zebra F1
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Squash Seeds - Summer - Golden Zebra F1
Starting at $3.99
Squash Seeds - Summer - Partial Eclipse F1small size packet type seed packaging for - Squash Summer Partial Eclipse F1
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Squash Seeds - Summer - Partial Eclipse F1
Starting at $4.29
Melon Seeds - Cantaloupe - Scrumptious Hybridmid size pouch type seed packaging for - Melon Cantaloupe Scrumptious Hybrid
-60%
Melon Seeds - Cantaloupe - Scrumptious Hybrid
Starting at $1.99
Squash Seeds - Winter - Pinata F1 PMTsmall size packet type seed packaging for - Squash Winter Pinata F1 PMT
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Squash Seeds - Winter - Pinata F1 PMT
Starting at $4.29
Corn Seeds - Sweet - Sugar Buns Hybrid (treated)mid size pouch type seed packaging for - Corn Sweet Sugar Buns Hybrid treated
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Corn Seeds - Sweet - Sugar Buns Hybrid (treated)
Starting at $49.06
Radish Seeds - Everest - Hybridmid size pouch type seed packaging for - Radish Everest Hybrid
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Radish Seeds - Everest - Hybrid
Starting at $1.99
Leaf Radish Seeds - Saisai - Hybridmid size pouch type seed packaging for - Leaf Radish Saisai Hybrid
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Leaf Radish Seeds - Saisai - Hybrid
Starting at $3.99
Sweetest Corn Seeds CollectionSweetest Corn Seeds Collection
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Sweetest Corn Seeds Collection
$18.66
Sunflower Seeds - Starburstmid size pouch type seed packaging for - Sunflower Starburst
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Sunflower Seeds - Starburst
Starting at $4.29
Radish Seeds - Relish Cross - Hybridmid size pouch type seed packaging for - Radish Relish Cross Hybrid
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Radish Seeds - Relish Cross - Hybrid
Starting at $3.99
Squash Seeds - Summer - Lunar Eclipse F1small size packet type seed packaging for - Squash Summer Lunar Eclipse F1
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Squash Seeds - Summer - Lunar Eclipse F1
Starting at $3.89
Melon Seeds - Whimsy F1mid size pouch type seed packaging for - Melon Whimsy F1
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Melon Seeds - Whimsy F1
Starting at $5.59
Watermelon Seeds - Mini - Triple Gold Hybridsmall size packet type seed packaging for - Watermelon Mini Triple Gold Hybrid
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Watermelon Seeds - Mini - Triple Gold Hybrid
Starting at $7.29
Squash Seeds - Winter - Chieftain Hybridsmall size packet type seed packaging for - Squash Winter Chieftain Hybrid
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Squash Seeds - Winter - Chieftain Hybrid
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Squash Seeds - Summer - Green Zebra F1small size packet type seed packaging for - Squash Summer Green Zebra F1
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Squash Seeds - Summer - Green Zebra F1
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Squash Seeds - Winter - Indian Brave F1small size packet type seed packaging for - Squash Winter Indian Brave F1
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Squash Seeds, Summer - Lunar Eclipse F1 - Organicsmall size packet type seed packaging for - Squash Summer Lunar Eclipse F1 Organic
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Organic
Squash Seeds, Summer - Lunar Eclipse F1 - Organic
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Watermelon Seeds - Icebox - Tiger Baby Hybrid (Organic)mid size pouch type seed packaging for - Watermelon Icebox Tiger Baby Hybrid Organic
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Organic
Watermelon Seeds - Icebox - Tiger Baby Hybrid (Organic)
Starting at $6.79
Watermelon Seeds - Icebox - Tiger Doll Hybridmid size pouch type seed packaging for - Watermelon Icebox Tiger Doll Hybrid
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Watermelon Seeds - Icebox - Tiger Doll Hybrid
Starting at $5.99
Corn Seeds - Sweet - Inspiration Hybridmid size pouch type seed packaging for - Zinnia Magellan Series Orange
-68%
Corn Seeds - Sweet - Inspiration Hybrid
Starting at $1.99
Squash Seeds - Winter - Sugaretti F1 AASsmall size packet type seed packaging for - Squash Winter Sugaretti F1 AAS
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Squash Seeds - Winter - Sugaretti F1 AAS
Starting at $3.99
Watermelon Seeds - Mini - Treasure Chest Hybrid
Starting at $9.19
Sunflower Seeds - Goldie
Starting at $4.29
Sunflower Seeds - Early Black Heart
Starting at $3.99
Radish Seeds - Korean - Passion Altari Hybrid (Treated)
Starting at $3.99
Sunflower Seeds - Santa Fe Sunrise
Starting at $4.59
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