Was wondering if anyone knows how big sweet potato plants get? I live in Mi. & have planted "Georgia Jet" sweet potatoes. I've never grown them before but they are supposed to be able to grow in my zone here. They are healthy but don't seem to be getting very big. Any help would be appreciated.:)

Regular potato plants don't get very big on top either, so assuming that sweet potatoes are the same, everything is concentrated under ground. At least that is my knowledge from growing potatoes.