Mechanical damage covers injuries to plants from the careless use of garden machinery and tools. One of the most common forms is the removal of bark from trees by lawnmowers. If this happens on a regular basis, consider altering the shape of the lawn or have a wider area of longer grass around trees.

Tree, shrub and other plants ties can cause strangulation or chafing; this may be avoided by regular checks, at which point tight ties may be loosened.

One of the most serious forms of damage is from ragged and badly placed pruning cuts. This can provide entry points for disease that may weaken the plant, and in severe cases, may even lead to its death. Keep pruning equipment sharp, and make sure that any cuts are made in the right position. Our guide to pruning has a wealth of further information on this topic.