Trimming is plant health, not just looks
A shrub that has not been cut in three years is not just too big. It has gone dense on the outside and hollow underneath, because light cannot reach the interior growth. Once that happens, cutting it back reveals bare wood instead of green.
Regular trimming keeps the interior alive. Thinning out crossing branches and deadwood improves airflow, which reduces fungal problems on boxwood and yew in particular. Cutting shrubs back off siding stops moisture from being held against the house.
Timing matters too. Spring-flowering shrubs set next year's buds soon after they bloom, so trimming them in fall removes the flowers before they ever appear. We trim on the plant's schedule, not just whenever we happen to be there.




