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Elephant bush has favorable fire-performance listings, but the evidence does not yet establish that it is fire resistant.
The University of California Forest Products Laboratory reported that Portulacaria afra was recommended by seven references for high-fire-risk areas. The Diablo Firesafe Council also lists it favorably as a succulent groundcover, based on seven of the council’s 57 numbered references. Both sources point toward favorable use, but neither rating provides a clear, scientifically defined measure of fire resistance.
The limitations are stated by the publishers. The university compilation drew from more than 25 earlier lists and says those lists often used undefined terms and lacked a scientific basis. The Diablo council likewise says most ranking terms used by its references were undefined. Its guide mirrors compiled ratings, so the second favorable appearance does not turn the underlying recommendations into a measured result.
Elephant bush is a groundcover in the Didiereaceae family. Its favorable listings are encouraging, but the evidence remains mixed because the meaning and scientific foundation of those ratings are uncertain. If a landscaping decision requires documented fire resistance, these listings support consideration of elephant bush but do not settle how it will behave in a fire.
Form
groundcover
Rated in
California
On this lot
1. Fire evidence and conditions
Fire evidence
Mixed evidence — location does not change the cited classification.
The guide presents itself as fire performance ratings for common landscape plants in a fire-prone California setting. FireApproved publishes 104 exact owners as republished California context. It is not an independent rating, a current endorsement, or parcel suitability.
The UC Forest Products Laboratory says the guide covers properties of common California landscaping plants and was prepared for California fire agencies. FireApproved publishes 130 exact owners at historical California publication scope. The report is a 1997 compilation, not a current endorsement, site rating, or independent test of every row.
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.
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.
Defensible Space Landscaping in the Urban/Wildland Interf…: Chapter 4, Landscape Vegetation Database [ucfpl-1997] (with its recommendation)
Fire Performance of Common Plants: Table 1 (favorable in 3 or more references) [diablo-guide-to-plants-three-reference-vote] (with its recommendation)
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.
Fire Performance of Common Plants (Guide to Plants) — Diablo Firesafe Council · live page captured 2026-08-29 · original sourceCorroborationMirrorlineage: ucfpl-berkeley resolves to Defensible Space Landscaping in the Urban/Wildland Interface: A Compilation of Fire Performance Ratings of Residential Landscape Plants
“Table 1: favorable fire performance rating in 3 or more references (refs 7,9,10,24,40,41,53)”
The Diablo Firesafe Council Guide to Plants lists Portulacaria afra (Purslane tree, Elephant's food) as groundcover, succulent, in Table 1: plants with a favorable fire performance rating in 3 or more references. The guide cites 7 of its 57 numbered references for this row (7,9,10,24,40,41,53). The guide states the ranking terms in its underlying references were mostly undefined and makes no attempt to rank within the list, and that fire performance is compromised without maintenance.
