North Carolina · zones 7a–8b
When to plant sweet potatoes in North Carolina.
Sow or transplant between May 10 to Jun 24 in a typical year, keyed to North Carolina's median last frost around Apr 3. Dates below are state medians; your ZIP code shifts them by days to weeks.
The 2026 windows
Sweet Potatoes dates for a typical North Carolina season.
1 · Start indoors
Mar 29 to May 13
About 6 weeks before set-out. Warm spot, real light.
2 · Set out
May 10 to Jun 24
Keyed to the ~Apr 3 last frost. Sow 3" deep, 14" apart.
Harvest
~110 days later
~2.5 lb per plant over ~1 weeks.
North Carolina spans more than one climate: Zone 8 is the most common zone, but the state runs 7a to 8b. 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.
In North Carolina: watch for
The pests that find sweet potatoes here.
A middle-length season, about 214 frost-free days, means sweet potato overlaps sweetpotato weevil for a stretch each summer. Check plants every week or two and treat early.
Sweetpotato weevil
Narrow tunnels through roots, and a bitter taste that survives cooking.
Organic fix: Plant certified slips, rotate the bed, and destroy any vine with a wilting runner.
Wireworms & white grubs
Shallow holes and grooves chewed into the roots, found only at digging time.
Organic fix: Avoid planting into ground that was in sod last year; rotate away from grassy beds.
Clusters on the tender growing tips of new vines.
Organic fix: Hose them off in the morning, or use insecticidal soap.
Black rot
Dry, firm dark patches on the roots, usually found at harvest or in storage, with a sweet fruity smell.
Organic fix: Start from clean slips cut well above the soil line, never save roots from a bad crop, and rotate 3 years.
Your season math: North Carolina gives sweet potatoes about 214 frost-free days, and it needs roughly 110 days to a first harvest. It's a one-planting crop, so time that single sowing well.
Planting sweet potatoes in North Carolina: questions
When should I plant sweet potatoes in North Carolina?+
In a typical North Carolina year, sow sweet potatoes or set out transplants between May 10 to Jun 24, keyed to the state's median last frost around Apr 3. Your exact dates shift with your ZIP code and microclimate.
When do I start sweet potatoes seeds indoors in North Carolina?+
Start seeds inside about 6 weeks before set-out: roughly Mar 29 to May 13 for a typical North Carolina season.
What USDA zone is North Carolina?+
North Carolina spans zones 7a–8b, mostly zone 8. But frost dates, not zones, set planting time. The free planner uses your ZIP code's actual frost dates.
How many sweet potatoes plants do I need?+
Depends who you're feeding. The crop page has exact counts per household size, or the free planner does the math for your family in about 60 seconds.