How far can you prune a rose of Sharon? As a rule of thumb, allow 8 to 12 inches ( cm.) between inner branches for the best flowering display. If your rose of Sharon bush is old and has not been pruned in several years, renewal pruning rose of Sharon shrub offers the opportunity to start over. Jun 27, Pruning rose of Sharon shrub may be done in late fall or winter after leaves drop or in early spring before buds shrubnotch.buzz of Sharon pruning done later than early spring may cause the loss of some blooms, but those that are not removed will be larger.
Sep 14, Prune out of control shrubs that are in need of rejuvenation in the early spring as soon as the threat of frost has passed. Cut all older branches to two-thirds of their original height.
Jan 18, Some people prefer to prune Rose of Sharon in winter, when there are no leaves on the plant, so they can readily see the shrub’s structure - and this is just fine. Nov 16, I always prune the one at one of my client's house when it is leafless. For us in SoCal that is Jan/Feb. It is easier to do then and never interrupts blooming later. And you can really hack Rose Of Sharon(Hibiscus syriacus) hard. They always snap out of it.
Good luck:) When do you prune Rose of Sharon bushes? I usually trim mine in early spring.