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Aug 20, You can cut a Rose of Sharon close to the ground, but it should only be done in early spring and if the plant has grown to unruly sizes. If you haven’t pruned your Rose of Sharon in several years, you will want to cut it down to 1/3 its original size within several inches off the ground.
Pruning Your Rose of Sharon.
Feb 08, In addition to reducing the height, you can cut out dead or diseased wood and remove any out-of-control branches back to the base. Because rose of Sharon blooms on the current season’s growth it should be pruned in late winter. Next winter, remove any new growth from the previous year and an additional third from the existing old treenotch.barted Reading Time: 3 mins.