knockout rose pruning
I have a knockout rose that has greatly exceeded the size I expected, it is over 6 feet high and wide. I prune it every spring and it's done very well, but now it's gotten top heavy and seems like a needs a more severe pruning. I am wondering how drastic of a pruning I can do to this plant without harming it (seems like the general pruning limit for many plants is removing no more than one-third).
Harford County Maryland
Usually knockout roses are cut back every year in late winter or early spring to approximately 24 inches. You can prune now and the rule of thumb is about 1/3. This will delay flowering till later in the season.
Thanks. So I'm assuming it's ok to cut the plant back in the late winter/spring to ~24 inches, even though I would be removing more than 1/3?
Yes, that would be fine.