Scarlet Romance Rhododendron Scarlet Romance Rhododendron has red flowers form into very round trusses. Growth habit is spreading with a plant that can be twice as wide as it is high. Primary Color: Red Bloom Time: Late Height in 10 Years: 4' Hardiness (Temperature): -25 Sun / Shade: Morning Sun, Afternoon Shade Landscape Category: Shrub Genus: Rhododendron More plants in: Hybrid Rhododendrons Find out if this plant is available: Rhododendron and Azalea Availability List