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Begonias cannot be called uniformly fire resistant because two expert guides reach opposite practical verdicts.
Ohio State University Extension rates begonias “L” for low flammability, a recommended result on its five-point scale. Its 2006 guidance specifically describes their succulent foliage as fire resistant, while also warning that the plants are prone to mulch-induced nitrogen deficiency. This assessment treats begonias as perennials and reflects expert experience for Ohio and the Midwest.
The 2020 Spanish edition from the Diputació de Girona and Catalonia’s fire service rates Begonia species “desaconsejada,” or discouraged. That conclusion comes from a broader garden-suitability method. It assumes species-specific care and weighs fire research and fire-service experience together with fuel structure, maintenance, origin, and invasiveness.
The disagreement is therefore partly about what is being judged. Ohio State focuses its verdict on plant flammability and identifies the succulent leaves as resistant. The Catalan guide asks whether a plant is suitable for gardens exposed to wildfire, using factors beyond the foliage itself. For a homeowner, begonias have a favorable low-flammability rating under the Ohio scale, but they do not have consistent support as a fire-resistant landscaping choice across regions and assessment methods.
Questions
Why does this record show a conflict?
The computed recommendation is conflict. This page is a genus-rank umbrella record, not a species verdict. Same-form alternatives are cited on the related list.
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.
2. Why this plant is relevant here
State distribution
Documented in OH.
Native range
Introduced / established
USDA hardiness
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.
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.
Guía de pirojardinería: not suitable inside the 25-metre maximum-risk zone [girona-2020-iuf-25m-suitability] (with its avoid 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.
Begonia spp. is rated “DESACONSEJADA” by the guide's qualitative IUF garden-suitability method. The method assumes species-specific care and integrates fire evidence with fuel structure, maintenance, origin, invasiveness, and expert fire-service experience.
