pollarding

Pollarding is a pruning system involving the removal of the upper branches of a tree, which promotes the growth of a dense head of foliage and branches. In ancient Rome, Propertius mentioned pollarding during the 1st century BCE. The practice has been common in Europe since medieval times, and today is used in urban areas worldwide, primarily to maintain trees at a determined height or to place new shoots out of the reach of grazing animals.

In the past, people pollarded trees for fodder to feed livestock or for wood. Fodder pollards produced "pollard hay" for livestock feed; they were pruned every two to six years so as to maximize the leafy material. Wood pollards were pruned every eight to fifteen years, which produced upright poles favored for fencing and boat construction. Supple young willow or hazel branches may be harvested as material for weaving baskets, fences, and garden constructions such as bowers. Nowadays, the practice is sometimes used for ornamental trees, such as crape myrtles in southern states of the US.