How to Grow Sweet Corn
Ready to grow Sweet Corn?
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🛠️ Supplies You'll Need
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Find Your Sweet Corn Planting Dates
🌿 Plant Overview
☀️ Growing Requirements
☀️
Sun
Full Sun (8+ hours)
💧
Water
High (consistent moisture, especially at silking)
↔️
Spacing
12" apart
🌱
Depth
1" deep
📏
Height
60-96"
🌱
Germination
5-10 days
Ready to Grow Sweet Corn?
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🌾 Seed Saving Guide
🔴 DifficultWhen to Harvest Seed
Leave selected ears on stalks until husks are dry and brown. Harvest after first frost.
Processing
Husk dried ears, shell off kernels by hand, spread to cure 3–4 weeks before storing.
Seed Viability
Up to 2 years when stored cool, dark, and dry.
Pro Tip
Wind-pollinated — requires 1000-foot isolation from all other corn varieties. Needs 200+ plants minimum for genetic diversity.
Seed Storage Supplies
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Raised Bed Planting Guides
A 4×8 bed fits 32 plants of Sweet Corn. See plant counts, spacing grids, and companion pairings for every bed size →
Sweet Corn Planting Calendar by Zone
Sweet Corn Planting Calendar by State
Other Plants
Frequently Asked Questions
When should I plant Sweet Corn? +
Sow Sweet Corn seeds directly in the garden 2 weeks before your last frost date. Use the search on this page to find exact dates for your location.
How long does Sweet Corn take to grow? +
Sweet Corn typically matures in about 75 days from planting. Exact timing varies by variety, soil conditions, and local climate.
Should I start Sweet Corn indoors or direct sow? +
Sweet Corn does best when direct sown outdoors. Plant seeds directly in the garden at the appropriate time based on your local frost dates.
How much sun does Sweet Corn need? +
Sweet Corn requires full sun (8+ hours) to thrive.
How far apart should I plant Sweet Corn? +
Space Sweet Corn plants 12 inches apart to allow adequate airflow and root development.
How much water does Sweet Corn need? +
Sweet Corn has high (consistent moisture, especially at silking) water needs. Consistent moisture is important especially during germination and early growth.
Can you save seeds from Sweet Corn? +
Yes — seed saving difficulty for Sweet Corn is rated difficult. Leave selected ears on stalks until husks are dry and brown. Harvest after first frost. Husk dried ears, shell off kernels by hand, spread to cure 3–4 weeks before storing.
How long do Sweet Corn seeds last in storage? +
Properly dried and stored Sweet Corn seeds remain viable for up to 2 years. Store in a cool, dark, dry location in an airtight container with a silica gel packet for best results.
Are Sweet Corn seeds open-pollinated? +
Yes — Sweet Corn is open-pollinated, meaning seeds saved from your harvest will grow plants true to the parent variety. This makes it an excellent candidate for building a self-sustaining garden.
About Sweet Corn
Plant in blocks of at least 4 rows for good wind pollination. Harvest when silk turns brown and kernels squirt milky juice. Best eaten immediately after picking.
Expect your Sweet Corn to be ready for harvest in approximately 75 days from planting.
Use the search above or browse by zone or state to find the perfect planting dates for your location.