|'Regal' is a vigorous grower with a broad, spreading habit which bears an abundance of showy, vivid, light purplish-pink flowers beginning in mid-April. The 'P.J.M.' group of rhododendrons are smaller, growing to a height of 3 to 6 feet tall. Form is rounded and foliage is leathery and dark green until fall when it turns almost purplish.
One of the reasons the 'P.J.M.' group is such a heavy flowerer is that the plant does not set seed. An excellent rhododendron for the New England states. 'P.J.M.' rhododendrons are the result of crosses between R. carolinianum and R. dauricum var. sempervirens. They were first developed by the Weston Nurseries in Hopkinton, Massachusetts.