Tree wrap is used to prevent Sunscald which usually occurs during winter and early spring. Intense sunlight warms the surface of the trees to the point of stimulating cell activity in the bark. A sudden drop in temperature at night can cause damage to the tree resulting in a condition known as Sunscald. Tree wrap is necessary for, not only newly planted trees but also thin barked trees, like soft maple, honeylocust and crabapples. Wrap from Thanksgiving to Easter!