Novice23
I have a Pieris which is probably 20years old and when it gets too big I just cut it back to a good shape, it may take a year, but it rejuventates its, and looks great. I have cut it back in spring, before it starts shooting, but also in autumn, when it is getting ready for winter, it does not seem to care when, it just repays your attention. And believe me I do not have green fingers... Just go for it.