Why do people prune trees?
People commonly prune trees to remove dead branches, remove crowded or rubbing limbs, or to eliminate hazards. Trees also are pruned to increase light and air penetration to the inside of the tree’s crown or to surrounding landscape. But in most cases, mature trees are pruned as a corrective or preventative measure. Since each cut has the potential to change the growth of the tree, no branch should be removed without a reason, Skiera said. “Urban environments are not ‘natural’ conditions for trees, so trees usually have to be modified in some way,” Skiera said. “But homeowners need to remember that heavy pruning can severely stress a tree. They need to exercise caution and a little common sense when they prune.” Removing foliage – the primary source of energy-producing sugar for trees – can reduce growth and stored energy reserves. Skiera said a good rule of thumb for pruning is to maintain at least half the foliage on branches in the lower two-thirds of a tree. Pruning techniques Ther
