Harold GreerHarold hybridized this rhododendron as a cross between Very Berry and Horizon Monarch and loved the outcome so much he named it after himself! It has white and magenta blooms with a deep red throat. Harold Greer reaches around 5' tall at maturity. It will grow best in well draining soil with full sun to partial shade. A cold hardiness factor is not established but this plant is thought to be good in zones 6 9.