The soil requirement listings at the plant link says that there are three levels of acidity for rose of Sharon.
My rose of Sharon is in a spot where the soil has not been tested for acidity. I'm almost sure that the acidic level of the soil where it's at is rather low and it's doing fine in this spot.
nancyjo, that bloom was from last year and it had several more. I just happened to take a pretty good photo of one of the blooms. I havn't pruned it yet, it's still in its early growth stages, only about 4 feet tall, if that.
maybe someone can help me. i have this variety and it's been doing quite well until the recent storms in PA. it's drooping. not broken. but can i prune now without harming? my plant is about 10ft tall...hundreds of blooms...i've never done anything to it since i planted it at least 10 years ago.