'Red Demon' Deciduous AzaleaBotanical Name Rhododendron Red Demon Plant Type Deciduous flowering shrub Mature Size 1. 52 m (56 ft) tall 1. 52 m (56 ft) wide Hardiness Zones 58 (hardy in Southern Ontario) Native Area Hybrid cultivar Spring: Produces clusters of vivid red flowers. Summer: Green foliage creates a dense, upright shrub. Autumn: Leaves turn bronze to orange before dropping. Winter: Deciduous, resting until spring bloom.