My Hydrangea Villosa which had grown to about 9 feet in height has been severely damaged by heavy snow. The large (about 4 inches in diameter) middle trunks of the hydrangea seem to be loose at the crown and so will have to be taken out. The trunks on the outside don't seem loose but now are almost down to the ground and will break if pulled back. Can this hydrangea start again if it is cut to the ground? What would be the best approach to pruning or should I replace?