Live in zone 7a which is borderline for muscadines. Last spring I planted few, winter killed one outright, another only had about 3 feet of the cordons killed. The third is the one I have a question about. It appeared to have been killed but the trunk is budding out at about 2 foot high, it is also growing a new sprout from the root. The sprout has grown to about 8 inches. Should I cut off the trunk and allow the sprout to grow into another trunk or allow a bud on the existing trunk to grow.