How big does a pieris Mountain Fire plant Get?
This midsize bush achieves a maximum height of 4 to 8 feet, with a mature width of 3 to 6 feet. When fully grown, it has a dome-shaped canopy held on multiple arching stems. If planting more than one pieris, space them roughly 6 feet apart unless you are planning to use them as a hedge, in which case they can be somewhat closer.