Harry, this received one of the 2007 Rhododendron of the Year Awards; Rhododendron.org describes it as:

Evergreen Azalea: 'Herbert'
R. yedoense var. poukhanense x R. 'Hexe'

Flower vivid reddish-purple with a darker blotch, openly funnel-shaped, 1¾" across, frilled edges, hose-in-hose. Blooms midseason. Leaves elliptic, acute apex, cuneate base, about 1" long, medium green. Dense, spreading habit. Grows to a height of 3 ft. in 10 years. Cold hardy to -10° F (-23° C). Hybridized by Gable.

That's what the tag said, 3 feet tall and wide at maturity. I hope that is true or else it will spill onto my walk and require awkward pruning or a transplant.

Three feet in ten years, yea right. Mine obvious didn't get the memo. The thing is 2 feet in three years. I actually had to prune it because it and pleasantly white were starting to invade each other. Why can't it be more like hot shot which grows as fast as a turtle.