Why topping is not a shortcut to a safer tree
Reviewed and updated September 24, 2026
Making a tree shorter by indiscriminately cutting branches back to stubs is not the same as a planned reduction. ISA's Why Topping Hurts Trees describes stress, decay and weakly attached replacement growth as reasons topping can increase later risk.
Tell the arborist what is actually in conflict: a roof, clearance or another use of the space. Ask for the proposed reduction or alternative to be explained against that objective, rather than accepting a promise to cut everything to one height.
ISA explains that shoots after topping can be weakly attached. New green growth alone therefore does not answer the structural question. If the tree has already been topped, give the arborist the history and ask what needs assessment.
The brochure distinguishes appropriate branch reduction from topping and notes that removal and replacement can sometimes be preferable. It does not say which option is right for your tree. Ask for the reason, the parts to be treated and the limits of the proposed result.
No species-specific cutting prescription or future-failure prediction is supplied.
No price, property-value percentage or liability conclusion is adopted.