overprune
/ˈoʊvəˌpruːn/Definitions
1. verb
to prune or cut back a plant or shrub excessively or at the wrong time
“The gardener was accused of overpruning the tree, which left it vulnerable to disease.”
2. noun
the act of pruning or cutting back a plant or shrub excessively or at the wrong time
“The overpruning of the garden was a costly mistake for the homeowner.”