PJM Compacta Rhododendron PJM Compacta Rhododendron is one of the earliest bloomers. Lavender-pink flowers. Hardiness and its mahogany winter color makes this a very popular plant. Primary Color: Lavender Bloom Time: Early 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