Connecticut · zones 6a–7a
When to plant sweet corn in Connecticut.
Sow between Apr 29 to Jul 29 in a typical year, keyed to Connecticut's median last frost around Apr 22. Dates below are state medians; your ZIP code shifts them by days to weeks.
The 2026 windows
Sweet Corn dates for a typical Connecticut season.
Direct sow
Apr 29 to Jul 29
Keyed to the ~Apr 22 last frost. Sow 1.5" deep, 12" apart.
Harvest
~75 days later
~1 lb per plant over ~1 weeks.
Connecticut spans more than one climate: Zone 6 is the most common zone, but the state runs 6a to 7a. That's why the planner works from your ZIP code's frost dates, not your zone — mountain and coastal gardens in the same state can be three weeks apart.