Tree Trimming Pruning Methods

Importance of routine pruning

*A tree that is not maintained on a routine cycle will assume its normal form, which may put it in danger of coming into contact with electrical infrastructure, resulting in the need to extensively prune or remove the tree.

Minimize the number of cuts

*Tampa Electric’s tree trimming crews work to minimize the number of pruning cuts to a tree in order to prevent serious injury to the tree. The intent with quality vegetation management is to remove whole branches that are growing toward utility facilities. When clearance distances are specified (for example, 10 feet) the cut should be made at the next suitable lateral of parent limb beyond the specified distance.

Directional pruning

*Directional pruning (also known as natural pruning) is most effective when tree characteristics such as size, shape and expected growth rate are taken into consideration. Proper directional pruning of trees growing directly beneath facilities (left) or beside them (right) helps direct future tree growth away from the facilities.

*Removal of overhanging vegetation may or may not be necessary, depending on the type of utility facility, tree species and other factors. Overhang is never acceptable over high priority facilities such as high-voltage electric transmission lines.

Rounding over and stubbing

*Rounding over, topping or stubbing severely damages trees and is now a discredited practice (left). Many tree species respond to this type of pruning with a flush of fast-growing sprouts, which can rapidly overtake facilities (right).

Palm pruning

*Many palm species grow large enough to affect utility facilities. Their large fronds sway in the wind and may break free, causing damage to facilities. Palms cannot be reduced in height or directionally pruned like other trees. The best solution for palms interfering with utility facilities is removal or relocation.