noun
tree vigor; health of a tree; growth of a tree
Refers to the vitality and growth condition of a tree, often used in horticultural or arboricultural contexts.
この桜は樹勢が衰えてきたので、剪定が必要だ。
This cherry tree's vigor has declined, so it needs pruning.
樹勢の強い苗木を選んで植えた。
We selected and planted seedlings with strong vigor.