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Pernell Gerver |
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"Prune Rose of Sharon before Transplanting" Q. I transplanted a rose of Sharon from my front lawn to a nice sunny spot in front of the wooded area in back of my house about 15 years ago. In the meantime, the then little trees have grown and now just about shut out the light from the poor rose of Sharon. However, it has dropped a number of seedlings. Now these seedlings are from three or four to about six to eight feet tall. I have promised a couple of people some of them, but don't know how to get the saplings to them. They are too tall to fit into a car. Can I cut them down to about three or four feet without hurting them badly or even killing them by doing so? Thanks. A. Rose of Sharon (Hibiscus syriacus) blooms late in the season in late summer. It's a shrubby hibiscus and the only pruning it needs is to control its overall size. If left unpruned, rose of Sharon forms a wide shrub with age and grows 12 to 15 feet tall. The time to do pruning on rose of Sharon is anytime between winter or early spring, so now would be a good time to prune it and at the same time thin out any overcrowded stems. The most you would want to prune away is one third of the top growth. Overcrowded stems can be cut back to the ground. You mentioned you want to transplant some of the shrubs. It's actually a good idea to cut back top growth when doing transplanting. The reason for this is that when the plant is dug up, many roots are cut from the plant's root system. By trimming off some of the top growth you are helping the plant to compensate for its loss of part of its root system. This should be done when transplanting other shrubs as well. Remember that rose of Sharon is late to leaf out in spring. New growth often doesn't appear until late May. Rose of Sharon blooms on new wood each year, so new shoots will produce flowers this year towards the end of the season. Other than controlling its size, rose of Sharon doesn't need regular pruning except to make it produce larger flowers. This is done by cutting last year's growth back down to two buds. This results in fewer flowers, but the flowers will be much larger than if it wasn't pruned at all.
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