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Rhododendron macrophyllum
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Pacific Rhododendron
( Rhododendron macrophyllum )
Rhododendron macrophyllum
More Photos at CalPhotos
More Info at Jepson eFlora
Calflora
Click on blue squares to see occurrence records.
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Estimated Plant Range (
?
)
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5 Nurseries Carry This Plant
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About Pacific Rhododendron (Rhododendron macrophyllum)
5 Nurseries Carry This Plant
Add to My Plant List
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
Shrub
Size
10 - 15 ft tall
Form
Upright
Growth Rate
Moderate
Dormancy
Evergreen
Flower Color
Purple, Pink
Flowering Season
Spring
Wildlife Supported
Butterflies & moths hosted ( 23
likely
* )
SHOW ALL
*
Gray Hairstreak
Strymon melinus
Strymon melinus
*
Hoary Comma
Polygonia gracilis
Polygonia gracilis
*
Satyr Comma
Polygonia satyrus
Polygonia satyrus
*
The Brown Elfin
Callophrys augustinus
Callophrys augustinus
*
Green Comma
Polygonia faunus
Polygonia faunus
*
Oreas Comma
Polygonia oreas
Polygonia oreas
*
White-lined Sphinx
Hyles lineata
Hyles lineata
Landscaping Information
Sun
Part Shade
Moisture
Moderate - High
Nurseries
Carried by 5
Soil Description
Prefers loamy or clay soils. Grows poorly in sandy soils.
Common uses
Deer Resistant
Propagation
?
For propagating by seed: No treatment. Best sown on milled sphagnum moss.
Sunset Zones
?
4*, 5*, 6*, 7, 14, 15, 16, 17
Natural Setting
Site Type
Moist places
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
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Pacific Rhododendron
Rhododendron macrophyllum
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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