Damaged plants may be delayed in starting spring growth. Broadleaved evergreens showing leaf damage will usually produce new leaves if branches and vegetative leaf buds have not been too severely injured. Damaged leaves may drop naturally or be removed by hand. Do not remove branches that reveals a green layer underneath when scraped with a knife. They should eventually develop new growth.
Ice crystals rupture cell walls.
This damage will show up as discolored leaves and dead branch tips. To prevent damage, avoid late summer or early fall fertilization while plants are still actively growing. Avoid late summer pruning which stimulates new, tender growth and reduces the supply of nutrients available to the plant through the winter. Split bark - A sharp temperature change between day and night can freeze water within branches or even the trunk of a tree, causing it to explode or split open in a symptom called frost cracks. If not severe, these cracks seem to close when warm weather arrives, but the wood fibers within may not grow back together.