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Pacific Rhododendron
Rhododendron macrophyllum
  
About Pacific Rhododendron (Rhododendron macrophyllum) 3 Nurseries Carry This Plant Pacific Rhododendron, Coast Rhododendron or Big Leaf Rhododendron is a broadleaf evergreen Rhododendron species native to western North America. Pacific rhododendron is found along the Pacific Coast from British Columbia to Monterey County in California. It is widely distributed in the Coast and Cascade Mountain Ranges. Pacific rhododendron is less abundant in the Coastal Mountains of Washington and northern Oregon and more common south of the Siuslaw River.
Plant Description
Plant Type
Plant Type
Shrub

Size
Size
10 - 15 ft tall

Form
Form
Upright

Growth Rate
Growth Rate
Moderate

Dormancy
Dormancy
Evergreen

Flower Color
Flower Color
Purple, Pink

Flowering Season
Flowering Season
Spring

Wildlife Supported
 


 
Butterflies & moths hosted ( 23 likely * ) SHOW ALL

Landscaping Information
Sun
Sun
Part Shade

Moisture
Moisture
Moderate - High

Nurseries
Nurseries

Soil Description
Soil Description
Prefers loamy or clay soils. Grows poorly in sandy soils.

Common uses
Common uses
Deer Resistant

Propagation
Propagation?
For propagating by seed: No treatment. Best sown on milled sphagnum moss.

Sunset Zones
Sunset Zones?
4*, 5*, 6*, 7, 14, 15, 16, 17

Natural Setting
Site Type
Site Type
Moist places

Climate
Climate
Annual Precipitation: 16.2" - 147.0", Summer Precipitation: 0.23" - 5.33", Coldest Month: 37.3" - 50.5", Hottest Month: 55.9" - 72.5", Humidity: 0.01" - 19.12", Elevation: 9" - 6298"

Alternative Names
Common Names: California Rosebay, Coast Rhododendron


Sources include: Wikipedia. All text shown in the "About" section of these pages is available under the Creative Commons Attribution-ShareAlike License. Plant observation data provided by the participants of the California Consortia of Herbaria, Sunset information provided by Jepson Flora Project. Propogation from seed information provided by the Santa Barbara Botanical Garden from "Seed Propagation of Native California Plants" by Dara E. Emery. Sources of plant photos include CalPhotos, Wikimedia Commons, and independent plant photographers who have agreed to share their images with Calscape. Other general sources of information include Calflora, CNPS Manual of Vegetation Online, Jepson Flora Project, Las Pilitas, Theodore Payne, Tree of Life, The Xerces Society, and information provided by CNPS volunteer editors, with special thanks to Don Rideout. Climate data used in creation of plant range maps is from PRISM Climate Group, Oregon State University, using 30 year (1981-2010) annual "normals" at an 800 meter spatial resolution.

Links:   Jepson eFlora Taxon Page  CalPhotos  Wikipedia  Calflora


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