The flowers of the Scarlet Wonder have bright red leaves with wavy edges. The flowers bloom in a loose cluster in April to around June. The 'Rhododendron Scarlet Wonder' is a fairly low-growing plant since the plant does not grow higher than approximately 60 cm, the plant grows to approximately 100 cm in width. This plant prefers a spot in the partial shade or sun and can flower in any soil type. The 'Rhododendron Scarlet Wonder' does not need to be pruned.