Ornamental tress should be cut no closer than one-half inch towards the trunk of the tree when thinning branches. Cutting the branch flush with the trunk creates a wound that infection can enter and cause disease and damage to the tree. If the tree is cut too close to the trunk, do not apply a wound dressing or tree sealant. These cause more damage, sealing bacteria and pests into the trunk. Allow the tree would to heal itself.
About this Author
Christina Wheeler has been a professional freelance writer since 2007. She lends her expertise in animal care, gardening and home improvement to online publications such as Garden Guides and eHow. Wheeler studied business management at Ohio University.