Ohio · zones 5b–6b
When to plant sweet potatoes in Ohio.
Sow or transplant between Jun 1 to Jul 16 in a typical year, keyed to Ohio's median last frost around Apr 25. Dates below are state medians; your ZIP code shifts them by days to weeks.
The 2026 windows
Sweet Potatoes dates for a typical Ohio season.
1 · Start indoors
Apr 20 to Jun 4
About 6 weeks before set-out. Warm spot, real light.
2 · Set out
Jun 1 to Jul 16
Keyed to the ~Apr 25 last frost. Sow 3" deep, 14" apart.
Harvest
~110 days later
~2.5 lb per plant over ~1 weeks.
Ohio spans more than one climate: Zone 6 is the most common zone, but the state runs 5b to 6b. 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.