I am a homeowner and need tree and landscape services.

Unsurprisingly, anything that is used to cover-up the area exposed after pruning a tree is a wound pruning sealer.

They do not have to be a commercially available product. Many gardeners utilizer home-made sealers, or products designed for other uses but used for this purpose – Estimated Reading Time: 8 mins. No – you should not use pruning sealers after pruning your trees or shrubs. In fact, research from the University of Arizona, found pruning sealers actually obstruct trees' natural healing power. Plus, pruning sealers may trap moisture in the tree, which can encourage wood decay or fungi.

Nov 28, Though many gardeners used to apply wound dressings such as latex paint mixed with water to protect trees after pruning, current research has revealed that this. Apr 14, No – you should not generally use pruning sealers after pruning your trees or shrubs. The main exception is when trees like elms and oaks, which are susceptible to vascular wilts such as Dutch elm disease and oak wilt, have to be pruned during the growing season for safety reasons.