One gallon plant from Azalea Red Formosa. Pictures are of a typical plant shipped. These pictures are not the actual plant, but very close to what you will receive. The Red Formosa is in the Indica family of Azaleas. The Red Formosa bloom is a single 3 inch diameter, reddish-purple flower that blooms in the spring. The Red Formosa Azalea is a fast growing evergreen shrub. It can grow up to 8 feet tall with a 6 foot spread. Semi-shade to Partial sun. Zone 8-10.