Bark splitting can occur in response to various environmental factors at different times of the year.
Splits can occur on the trunk of the tree as well as on branches.
Trees which are most susceptible to this type of injury are those with thin bark, such as certain fruit trees. Newly planted trees or young trees are more prone to bark-splitting. Bark splits are not likely to be fatal to trees, although they will, in some cases, allow entry of disease organisms which can cause decay. Frost cracks are also called southwest injury since this is the side of the tree most often affected. Painting the trunk white or wrapping with tree wrap helps prevent southwest injury.