Why would our Red Prince Weigela bush die over the winter?

Your Red Prince Weigela bush may die over the winter due to several factors, including extreme cold temperatures that exceed its hardiness zone, insufficient winter protection, or poor drainage leading to root rot. Additionally, if the plant was stressed during the growing season from drought, pests, or diseases, it may not survive the winter. Proper winter care, such as mulching and ensuring good drainage, can help prevent these issues.