Songbird Rhododendron Songbird Rhododendron has bright purple-blue flowers on a glossy green, compact plant. Tends to bloom in both spring and fall. Growth habit is small and compact shrub. Primary Color: Blue Bloom Time: Early Height in 10 Years: 3' Hardiness (Temperature): -5 Sun / Shade: Morning Sun, Afternoon Shade Landscape Category: Shrub Genus: Rhododendron More plants in: New Plants! Find out if this plant is available: Rhododendron and Azalea Availability List