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Great laurel is not consistently fire resistant: one whole-plant burn study rates it low, while regional guides rate it medium to high.
The USDA Forest Service and NIST measured heat release during whole-plant burns of ornamental shrubs in the Southeast. Their analysis placed great laurel in the low-flammability group, a result their scale treats as suitable to recommend. This is a direct burn result rather than an expert judgment.
Regional extension guidance is less reassuring. Ohio State’s extension service rated great laurel H on a five-point scale running from very low to very high; it also described the plant as requiring acid, moist, well-drained soil and as sensitive to disease and heat. Virginia Cooperative Extension likewise rated it H, the highest category on its three-point scale, while noting its need for acid soil and lack of heat tolerance. These ratings came from expert-curated landscape guidance rather than the whole-plant laboratory method.
An eastern Firewise selector rated great laurel “At Risk,” or 3 on its four-point scale. NC State placed it at medium flammability in both its 2005 guide and its 2025 successor. The methods and scales define different kinds of findings, but they do not settle the disagreement. For a roughly 15-foot tree near a home, the laboratory result is encouraging, yet the broader guidance does not support treating great laurel as reliably fire resistant.
The complete three-table AG-874 plant list is explicitly for North Carolina and contains 202 low-, medium-, or high-flammability rows. FireApproved accounts for all source rows under its strict taxonomy and lineage rules; source scope does not establish local suitability at a particular North Carolina site.
Ohio State University Extension Bulletin 921 is an Ohio publication that describes Ohio fire seasons and landscape conditions and labels nativity to Ohio. FireApproved publishes 352 exact source-owning plant records from its eight rated tables. This historical publication scope does not assert current extension endorsement or that a listed plant suits every Ohio site.
Virginia Cooperative Extension's publication opens with Virginia wildfire conditions, identifies its Virginia Firewise Landscaping Task Force, and labels plants native to Virginia. FireApproved publishes 306 exact source owners. Publication scope does not establish parcel suitability or current endorsement of this archived 2009 list.
2. Why this plant is relevant here
State distribution
Documented in AL, CT, DC, DE, GA, KY, MA, MD, ME, NC, NH, NJ, NY, OH, PA, RI, SC, TN, VA, VT, WV.
Native range
Current cited native range in AL, CT, DE, GA, KY, MA, MD, ME, NC, NH, NJ, NY, OH, PA, RI, SC, TN, VA, VT, WV.
Introduced / established
USDA hardiness
Documented minimum 5b; no upper limit is documented.
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.
Native and introduced range evidence
These are exact U.S. botanical-area records from the cited range source. Native and
introduced describe biogeographic relationship, not fire performance or planting approval.
Doubtful and extinct rows stay visible but do not count as current presence.
The lossless worldwide derivative is retained once in the research corpus; object pages repeat only exact U.S. areas needed by the local lens. The JSON twin carries the same page assertions.
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.
Source prints 5 · single-value meaning unresolved · whole zone precision · source stated
Source taxon: Rhododendron maximum · exact match.
Source location: Cold Hardiness Zone field in the recovered selector record.
Not used for comparison: The recovered selector prints one Cold Hardiness Zone value but does not define it as a minimum threshold or a one-zone range.
Minimum 5b · no upper limit documented · half zone precision · derived containing band
Exact source measurement: -13°F; mapped only to its containing half-zone.
Source taxon: Rhododendron maximum · source identifier match.
Source location: PlantCharacteristics record 65369, Temperature, Minimum (°F).
Where its sources say to plant it
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.
Eastern United States Fire Performance Plant Selector: Landscape Zone 2 — 5–10 ft from the structure; maintained lawn or fuel breaks, with easily ignited evergreens avoided [Fire Performance Plant Selector landscape zone] (mid-scale rating)
Firewise Landscaping: do not plant within 5 ft of structures (keep out of Zone 1) [OSU B921 source-category siting] (with its avoid rating)
North Carolina Extension Gardener Plant Toolbox: rhododendron-maximum [nc-toolbox-flammability-facet] (mid-scale rating)
The evidence
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.
