Plantae > Tracheophyta > Magnoliopsida > Ericales > Ericaceae > Rhododendron > Rhododendron macrophyllum

Rhododendron macrophyllum (Pacific rhododendron)

Synonyms:

Wikipedia Abstract

Rhododendron macrophyllum, the Pacific rhododendron, California rosebay, California rhododendron, coast rhododendron or big leaf rhododendron, is a species of Rhododendron native to western North America. It is the state flower of Washington.
View Wikipedia Record: Rhododendron macrophyllum

Attributes

Air Quality Improvement [1]  Low
Allergen Potential [1]  Medium-Low
Carbon Capture [1]  Low
Screening - Summer [2]  Dense
Screening - Winter [2]  Dense
Shade Percentage [1]  82 %
Temperature Reduction [1]  Low
Wind Reduction [1]  Low
Bloom Period [2]  Spring
Drought Tolerance [2]  None
Fire Tolerance [2]  Medium
Frost Free Days [2]  9 months
Fruit/Seed Abundance [2]  High
Fruit/Seed Begin [2]  Summer
Fruit/Seed End [2]  Fall
Growth Form [2]  Multiple Stem
Growth Period [2]  Spring, Summer
Growth Rate [2]  Moderate
Hazards [2]  Moderate Toxicity
Leaf Type [3]  Evergreen
Lifespan [2]  Perennial
Propagation [2]  Bare Root, Container, Cutting, Seed
Root Depth [2]  12 inches (30 cm)
Seed Spread Rate [2]  Rapid
Seed Vigor [2]  Medium
Seeds Per [2]  2499995 / lb (5511550 / kg)
Shape/Orientation [2]  Erect
Structure [3]  Shrub
Vegetative Spread Rate [2]  None
Flower Color [2]  Purple
Foliage Color [2]  Dark Green
Fruit Color [2]  Black
Flower Conspicuous [2]  Yes
Fruit Conspicuous [2]  Yes
Height [1]  14.76 feet (4.5 m)
Width [1]  12.464 feet (3.8 m)
Hardiness Zone Minimum [1]  USDA Zone: 6 Low Temperature: -10 F° (-23.3 C°) → 0 F° (-17.8 C°)
Hardiness Zone Maximum [1]  USDA Zone: 8 Low Temperature: 10 F° (-12.2 C°) → 20 F° (-6.7 C°)
Light Preference [2]  Mixed Sun/Shade
Soil Acidity [2]  Neutral
Soil Fertility [2]  Intermediate
Water Use [1]  Moderate to Low

Protected Areas

Name IUCN Category Area acres Location Species Website Climate Land Use
Ebey's Landing National Historical Reserve V   Washington, United States
H.J. Andrews Biosphere Reserve 15815 Oregon, United States
Oregon Caves National Monument V 456 Oregon, United States

Emblem of

Washington

Range Map

External References

USDA Plant Profile

NatureServe Explorer

Citations

Attributes / relations provided by
♦ 1i-Tree Species v. 4.0, developed by the USDA Forest Service's Northern Research Station and SUNY-ESF using the Horticopia, Inc. plant database.
♦ 2USDA Plants Database, U. S. Department of Agriculture
♦ 3Kattge, J. et al. (2011b) TRY - a global database of plant traits Global Change Biology 17:2905-2935
Abstract provided by DBpedia licensed under a Creative Commons License
Species taxanomy provided by GBIF Secretariat (2022). GBIF Backbone Taxonomy. Checklist dataset https://doi.org/10.15468/39omei accessed via GBIF.org on 2023-06-13; License: CC BY 4.0