Red Jack is a huge rhodo variety from the Netherlands from 1975. It produces large, widely funnel-shaped, brilliant red flowers with slightly frilled margins and gentle dotting in the throat from about mid May. Evergreen leaves are ovate, leathery, dull green, and matte. It can grow almost 3m tall and a little less wide.
For a better looking plant dead-head where possible. The roots are shallow, spreading to sides in search for nutrients. Never plant them too deep.