Dwarf Purple Rhododendron
Rhododendron impeditum
Ericaceae · broadleaf deciduous shrub · introduced
Last updated
As of March 31, 2026, soil temperature at Kent / Auburn is 47.7°F. Dwarf Purple Rhododendron, hardy to Zone Zones 4a–8b, is in early-season conditions in Zone 8b.
Dwarf purple rhododendron (Rhododendron impeditum) is a compact, dense-mounding deciduous shrub in the Ericaceae family native to China. It reaches only 1 ft tall with a 1-2 ft spread, making it one of the smallest rhododendrons in cultivation. Blue-purple flowers completely cover the shrub in mid- to late spring.
Hardy in zones 4a-8b, this species prefers sun to part shade with well-drained, acidic soil (pH below 6.0) and high organic matter content. All parts are poisonous to humans, cats, dogs, and horses. The compact size and profuse bloom make it distinctive among rhododendrons.