Details of...
Scientific Name: Rhododendron (evergreen spp. & cvs.)
Pronunciation: roe-doe-DEN-drun
Common Name: rhododendron
Family Name: Ericaceae
Plant Type: Broadleaf evergreen
Key ID Features: Leaves alternate, usually leathery, mostly elliptic, 2-20 cm long x 1-7 cm wide, petioles 5-20 mm long; flowers up to 5 cm wide; corolla deeply 5-lobed, stamens 10.
Course(s): HORT 1155, Level 3 Apprenticeship

Habit: Dense, Spreading, Upright
Form: Oval - vertical
Texture: Coarse
Mature Size:
Height:7 - 10m
Spread:4 - 5m
Growth Rate:Slow
Origin: B.C. west of Cascades, U.S. - northwest
Hardiness Rating: Zone 6: (-23 to -18 C)
Exposure: Deep shade, Filtered shade, Part sun/part shade
Soil/ Growing Medium: Humus rich, Well-drained
Water Use: Low
Landscape Uses: Group or mass planting, Mixed shrub border, Screening, Specimen plant, Tall background, Woodland margin (Caution: poisonous parts)
Additional Info: Google. Species shown may include R. arizelum, R. formosanum, R. fortunei, and R. macrophyllum (see separate entries for other species and cultivars on campus).
Leaf Morphology: Glossary
Form: Simple
Arrangement: Alternate
Texture/ Venation: Leathery
Surfaces: Glabrous
Colour in Fall: Green
Leaf(let) Terms:
Shapes: Elliptic
Apices: Acuminate, Acute
Bases: Attenuate, Obtuse
Margins: Entire

Inflorescence Type: Floriferous, Raceme
Flower Morphology:Flowers perfect
Number of Petals:5
Corolla Shape:Campanulate
Ovary Position:Superior
Colour (petals): Showy, White, Pink, Orange, Yellow, Dark-red, Purple, Red
Flower Scent: None
Flower Time at Peak: May
Additional Info: Source of image:

Fruit Type: Capsule
Fruit Colour: Brown
Fruiting Time: Aug, Sep
Additional Info: Not showy, Persistent

Bark or Stem Colour:
Leaf Bud Type: Striate scales Outer scale centered directly over leaf scar)
Leaf Scar Shape:Crescent shaped
Organ Modifications: Fibrous-like roots

Propagation: Layering, Softwood cuttings, Seed
Pest Susceptibility: Abiotic disorder, Beetles or weevils, Fungal leaf spot, Galls, Mildew, Root rot, ( Rabbit resistant )
(HPZ) Horticulture PlaZa : cv.?
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