Enter your ZIP to see whether this is legal to plant in your state, and whether it survives your winter.
Pacific rhododendron is rated fire resistant, with Oregon recommendations that retain a summer-care condition and a British Columbia research flag.
Oregon State's Forest Resource Note 6 lists Rhododendron macrophyllum among broadleaf evergreen shrubs for Southern and Western Oregon. Its general advice calls for healthy plants and some summer irrigation for most of the listed choices. Maintaining the planting is part of the recommendation, especially through Oregon's dry season.
The university's Willamette Valley publication also profiles Pacific rhododendron as suited to fire-resistant landscaping under that region's growing conditions. Its later broadleaf-evergreen gallery includes the species as another route to the regional plant guidance.
FireSmart BC favors Pacific rhododendron too, but attaches a request for more research. The research flag belongs with the favorable label. These sources support selecting the shrub for a fire-resistant landscape within their stated conditions, while leaving the British Columbia program's uncertainty intact. The agreement is useful regional guidance rather than an unconditional performance promise.
Form
shrub
Mature height
~15 ft
Water need
high
Rated in
British Columbia; Oregon; Oregon (Willamette Valley); Pacific Northwest (Oregon / Washington / Idaho)
On this lot
1. Fire evidence and conditions
Fire evidence
Fire-resistant — location does not change the cited classification.
Willamette Valley (OR footprint); partial normalized coverage · 2015-02-01
OSU Extension says EM 9103 highlights fire-resistant plants that thrive under Willamette Valley growing conditions. FireApproved publishes 172 exact owners only as valley context. The guide shares the PNW 590 lineage and is not a second independent vote or statewide site clearance.
2. Why this plant is relevant here
State distribution
Documented in CA, ID, OR, WA.
Native range
Introduced / established
USDA hardiness
3 applicable cited hardiness statements overlap but have different boundaries; compare each complete source row.
3. Legal, ecological, and broader status
Legal-list status
Seed-list status
Reported invasive here
Broader regional context
Federal context
How to read this page
The status above is computed from the cited rows below: independent recommendations can support a fire-resistant result, an avoid row can produce keep-away, and disagreement stays visible as conflict. Placement notes preserve each source’s own scheme rather than translating unlike rules into one scale. This is evidence about a plant, not permission to plant it in every part of the defensible space; Zone 0 remains noncombustible.
Plant hardiness evidence
These values describe the plant source. Your ZIP zone comes from the separate 2023 USDA
Plant Hardiness Zone Map. Whole-zone values stay whole-zone, and a single unresolved value
is not treated as a tolerance range. Different source boundaries stay separate: overlapping
statements are compared independently, while only ranges with no shared zone are called a conflict.
Placement rules below use each source's own distances or named zones, tied to its rating.
They are not interchangeable with the directory's current Zone 0 guidance.
Fire-Resistant Plants for Oregon Home Landscapes: Southern and Western Oregon [osu-frn6-oregon-regions] (with its recommendation)
Fire-resistant Landscape Plants for the Willamette Valley: Pacific Rhododendron profile (PDF page 143) [osu-em-9103-profile] (with its recommendation)
Grouped by what each source concluded. Primary evidence rated the plant itself
(a lab, field program, or original curation); corroboration compiled or
republished another source's rating and resolves to its root lineage.
“Fire-Resistant Plant Materials for Oregon”
· condition: green
Rhododendron macrophyllum (Pacific rhododendron) is listed under “Shrubs—broadleaf evergreen” for Southern and Western Oregon. The guide says most listed plants require some irrigation during Oregon's dry summer months and must be maintained in a healthy condition.
