Rhododendron

Rhododendron mucronulatum

Ericaceae · broadleaf deciduous shrub · introduced

Last updated

A broadleaf deciduous shrub reaching 4 to 8 ft tall and wide, among the earliest rhododendrons to bloom. Flowers appear on bare branches in late winter to early spring before leaves emerge, creating a striking display of rosy-purple to lavender-pink color. Native to northeastern Asia.

Full sun on acidic, well-drained to moist soil. Slow growth rate. The very early bloom period is both its greatest asset and its vulnerability: flowers are susceptible to late frost damage. Twenty-one diseases and 15 pests documented at the genus level. All parts are toxic if ingested.

Plant Profile

Size & Form

Height
4-8 ft
Spread
4-8 ft
Growth Rate
Slow

Site Requirements

Light
Full Sun
Soil Drainage
Well Drained To Moist
Soil pH
acidic
Water
Moderate
Watch for this season

Root Colonization (Spring–Fall)

Gall Development & Sporulation

Active Conidial Spread

RustHigh

Uredinial Stage (Summer)

+ 13 more — see full disease and pest lists below

Diseases: Regionally Documented (21)

Pests: Regionally Documented (15)

Cultivars (1)
'Cornell Pink'
Common name: Cornell Pink Azalea; Mature height: 5 ft
Data Maturity
Structured Multiple sources. Expert review underway.