The health and resilience of a tree (from the Latin ‘to be strong’), reflected in the capacity of the whole tree to grow (see growth rate). The term is often used as a description of overall condition on a qualitative scale from ‘high’ to ‘low’.

This definition is abridged from A – Z of tree terms: A companion to British arboriculture.
Read the preface. Order the book.

Previous term | Next term