Troubleshooting
Sweet potato problems — and how to fix them
Sweet potato (Ipomoea batatas) is generally forgiving once you match its basics, but a few issues come up again and again. Here is what each one looks like, why it happens, and the fix.
Slow growth in cool weather
Needs soil above 18°C; mulch with black plastic to warm.
Small tubers
Too much nitrogen or wet soil at maturity.
Splitting tubers
Drought followed by heavy rain.
Sweet potato weevil (US South)
Rotate planting; certified weevil-free slips.
Frost damage
Lift tubers before first frost; cure in warm dry conditions.
Prevent sweet potato problems before they start
Most sweet potato issues are care-mismatch, not bad luck. Dial in the basics:
Sweet potato problems — FAQ
Why is my sweet potato slow growth in cool weather?
Needs soil above 18°C; mulch with black plastic to warm.
Why is my sweet potato small tubers?
Too much nitrogen or wet soil at maturity.
Why is my sweet potato splitting tubers?
Drought followed by heavy rain.
Why is my sweet potato sweet potato weevil (us south)?
Rotate planting; certified weevil-free slips.
Why is my sweet potato frost damage?
Lift tubers before first frost; cure in warm dry conditions.