When to plant sweet corn
Sweet corn timing, counted from your average last spring frost and first fall frost. Plant in blocks of several short rows for pollination. Supersweet types want about 60°F soil.
| Season | warm-season, tender to frost |
|---|---|
| Sow outdoors | 1 week after to 3 weeks after the last frost |
| Soil temperature to germinate | 50°F or warmer |
| Days to maturity | 65–90 days from seed |
| Spacing | 8–12 in apart, rows 30–36 in apart |
| Seed depth | 1.5 in |
Example dates
| Place | Dates |
|---|---|
| Austin, TX (78701) | Sow outdoors: Mar 17–31 |
| Atlanta, GA (30303) | Sow outdoors: Mar 31–Apr 14 |
| St. Louis, MO (63101) | Sow outdoors: Apr 8–22 |
| Chicago, IL (60614) | Sow outdoors: Apr 17–May 1 |
| Denver, CO (80202) | Sow outdoors: May 7–21 |
| Seattle, WA (98101) | Sow outdoors: Mar 20–Apr 3 |
Every ZIP page has its own dates. Find your ZIP.
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Sources
- University of Missouri Extension: G6201: Vegetable Planting Calendar
- K-State Research and Extension: MF315: Vegetable Garden Planting Guide
- University of Maryland Extension: When to Plant Vegetables
- NC State Extension: Central North Carolina Planting Calendar for Annual Vegetables, Fruits, and Herbs
- UF/IFAS Extension (EDIS): SP 103/VH021: Florida Vegetable Gardening Guide
- Clemson Cooperative Extension HGIC: Planning a Garden
Summarized in our own words from public extension publications.
All vegetables · Your ZIP's planting calendar
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