Rhododendron
Rhododendron stenopetalum
Ericaceae · broadleaf deciduous shrub · introduced
Last updated
A broadleaf deciduous shrub in the Ericaceae, R. stenopetalum is a Japanese species known for its narrow, strap-shaped flower petals that give it a distinctive, spider-like appearance. Blooms on previous season's growth.
Requires acidic, well-drained soil. The unusual narrow-petaled flowers make this a conversation piece in the garden, distinct from the rounded trusses of typical rhododendrons. Twenty-one diseases and 15 pests documented at the genus level. All parts are toxic if ingested.
Root Colonization (Spring–Fall)
Infection at Bud Break
Apothecia Formation & Spore Release
Aecial Stage (Alternate Host)
+ 13 more — see full disease and pest lists below