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How to Prune a Tree - A Graphic Tutorial

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Important Tree Pruning Method #2 - Crown Raising
Tree Crown Raising

Tree Crown Raising

USFS
Crown raising is simply removing branches from the bottom of the crown of a tree to provide clearance for pedestrians, vehicles, buildings or lines of site. For street trees the minimum clearance is often specified by municipal ordinance.

When pruning is complete, the existing living crown should be at least two-thirds of the total tree height. Example: a 36 foot tree should have living branches on at least the upper 24 feet.

On young trees, "temporary" branches may be retained along the stem to encourage trunk taper and to protect trees from vandalism and sun scald. Less vigorous shoots should be selected as temporary branches and should be about 4 to 6 inches apart along the stem. They should be pruned annually to slow their growth and should be removed eventually.

In forest timber management and to develop a higher value tree, you remove limbs from below for clear wood. Removing limbs increases wood quality which increases timber production values. Removing lower limbs can also be of significant health value to certain tree species. Pruning lower branches on white pines can help prevent white pine blister rust.

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