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Bladder senna is rated fire resistant overall, but two authorities reach sharply different conclusions.
Catalonia’s provincial government and fire service rate the shrub “very recommended,” the most favorable category in their five-part garden-suitability scale. Their method assumes species-specific care and weighs fire research, fuel structure, maintenance, origin, invasiveness, and firefighters’ experience together. Greece’s environment ministry takes the opposite position, placing bladder senna among particularly flammable endemic trees and shrubs in its 2023 fire-protection regulation. The disagreement is direct: one source favors the plant for fire-adapted gardening, while the other identifies it as a fire concern. See the two findings.
The difference lies partly in what each judgment is designed to do. The Catalan guide evaluates garden suitability as a balance of several factors under appropriate care. The Greek regulation draws a protective line around plants it classifies as particularly flammable. A favorable landscape recommendation under a managed-care method does not erase a regulatory warning made for another region and purpose.
Bladder senna is a shrub in the Fabaceae family and has been introduced in 16 states, including California, Colorado, and Connecticut. Its reported range shows that the question is not confined to the Mediterranean climates where these authorities work. The overall classification leans fire resistant, but it rests on limited primary evidence and a genuine conflict. For planting near a home, the Greek warning deserves to remain part of the decision rather than being hidden by the favorable label.
Form
shrub
Rated in
Catalonia, Spain; Greece
On this lot
1. Fire evidence and conditions
Fire evidence
Fire-resistant — location does not change the cited classification.
17 sourced range or established records. This is not an invasive warning.
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.
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.
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: suitable inside or outside the 25-metre maximum-risk zone [girona-2020-iuf-25m-suitability] (with its recommendation)
Κανονισμός Πυροπροστασίας Ακινήτων εντός ή πλησίον δασικώ…: section 5.4.2, Table 2δi [greece-2023-particularly-flammable] (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.
Colutea arborescens is rated “MUY RECOMENDADA” 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.