Knowledgebase
Trimming in August... #351817
Asked August 10, 2016, 8:07 AM EDT
Washington County Minnesota
Expert Response
If you are willing to sacrifice some bloom for the sake of shaping the plant, trimming lightly now won't harm it. However, avoid pruning in late summer.
When hard pruning or rejuvenation is needed, do it in late winter or early spring.
This information may be of interest:
http://extension.psu.edu/plants/green-industry/news/2012/hacking-whacking-dealing-with-overgrown-shr...