Blue Peter Rhododendron Blue Peter Rhododendrons have frilly lavendar flowers, 2 3/4" across, with purple blotch in center. Primary Color: Lavender Bloom Time: Midseason Height in 10 Years: 6' Hardiness (Temperature): -10 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