Sometimes, instead of the bark splitting, it adheres to the wood instead of cracking, and as it dries it forms a sunken area or a canker. Bark splitting and frost cankers may be found at the crown and on the trunk. Stem wounds may increase the chance of bark splitting. Leaf Droop, Leaf Roll Drooping of leaves and leaf roll are protective reactions to cold. They reduce the amount of leaf surface exposed to cold or drying winds.
Leaves return to normal as temperatures warm.
In very cold weather, it is normal for entire leaves to roll inward on some rhododendrons. If leaves are not killed by extreme cold, even partially damaged ones will recover and the plant will return to normal when the weather improves. Limb and Branch Breakage Branches may break due to heavy snow or ice. Prune the broken portion of branches left on the tree or shrub back to another branch or the main trunk. On large branches make this cut just outside the branch collar.