Enter your ZIP to see whether this is legal to plant in your state, and whether it survives your winter.
Bougainvillea is rated fire resistant, but the two sources that address it disagree, and the verdict rests on limited evidence.
The case for it comes from Valencia's regional government. Its 2019 guide to low-flammability gardening for homes at the edge of forest land, an expert-curated list, places bougainvillea in its column of recommended low-flammability climbers. That is a landscaping recommendation for the ground where houses meet woodland, and it is what the fire-resistant rating rests on.
The case against it comes from Australia. Lesley Corbett's 2021 book Safer Gardens, a compiled reference on plant flammability, names bougainvillea as a plant that accumulates lots of dead, well-aerated litter, and it gives that example directly after advising that plants which build up this kind of litter are not good choices for the zone closest to a building. The dead, airy material that collects over time is what the warning is about.
Those two findings are not the same kind of statement. One recommends a species for low-flammability planting; the other warns about what the same species does over time near a house. Neither source explains the other, and the difference should not be dressed up as a reason: one is an expert-curated list and the other a compiled reference, and they were written for different countries.
Bougainvillea is a vine in the family Nyctaginaceae. For someone choosing it for a wall or fence near a house, the Valencian recommendation is a real endorsement, and the Australian litter warning is a real condition attached to it. Rated fire resistant on limited primary evidence means exactly that: a single recommendation carries the verdict, and one warning stands against it.
Form
vine
Region
Valencia, Spain
Rated in
Global compilation (published in Australia); Valencia, Spain / western Mediterranean
On this lot
1. Fire evidence and conditions
Fire evidence
Fire-resistant — location does not change the cited classification.
Fire-performance conditions
Fire ecology context
Placement evidence
Evidence regions
Global compilation (published in Australia); Valencia, Spain / western Mediterranean
Maintenance
2. Why this plant is relevant here
State distribution
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.
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.
