Several are available including:
Environmental Damage
Herbicide Injury
Additional pests and problems that may affect this plant:
Flea beetles and weevils can be a problem on occasion.This plant is a weak climber and is better used in hanging baskets, where the vien can cascade over the side. If grown upright on a support, some training will be needed.
This vine is grown from a tuber that can be dug and stored for the winter.