The benefits of winter pruning are numerous…
IDENTIFY DEAD OR HAZARDOUS LIMBS
The leafless dormancy period of winter allows trained arborists to more easily identify dead or hazardous limbs. Also, if the ground is frozen, then pruning activities will have a less damaging effect on the functional root zone of a tree or garden, which can be injured when pruned during warm weather.
OPTIMUM WOUND CLOSURE
The tree’s growth (including wound closure) slows significantly and does not begin again until the following spring. Research has shown that optimum wound closure is achieved by pruning during the late winter and early spring, right before the lush growth of spring.
AVOID INSECT AND FUNGAL INFECTIONS
The benefits of winter pruning minimize potential problems stemming from pruning at the wrong time, such as destructive insects and fungal infections attacking at the spot of the wound left by pruning. Pruning during winter months allows for the healing to begin before the warmer months bring on these complications.