Are wound dressings beneficial for trees?

Wound dressings are typically not beneficial for trees, primarily because they can trap moisture, creating an environment conducive to decay and disease. When a tree is injured, it naturally attempts to heal itself by compartmentalizing the damage and forming callus tissue. Applying a dressing can inhibit this natural process by retaining moisture against the wound, which fosters the growth of fungi and bacteria. Furthermore, the dressings can prevent essential air exchange at the wound site, further complicating recovery.

The idea that these dressings could promote healing or prevent pests lacks support in arboricultural practice. Trees have evolved mechanisms to protect themselves, and the use of wound dressings can interfere with these mechanisms, often leading to more harm than good. In general, the best course of action following a wound is to make clean, proper cuts and to allow the tree to heal naturally.