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Royal agave has favorable fire-performance ratings, but the available sources do not settle whether it is fire resistant.
The University of California Forest Products Laboratory reports royal agave recommended by three references for high-fire-risk areas. Diablo Firesafe Council lists royal agave as a succulent with favorable fire-performance ratings across multiple references. Sun City Texas Firewise Group rates royal agave’s flammability hazard “very low.” Its scale asks how readily plants sustain burning at high temperatures.
The caution lies in what those favorable ratings represent. The University of California publication compiles more than 25 earlier plant lists and warns that many lack a scientific basis or use terms that were never defined. Sun City defines its scale, but its guide is a Firewise group exhibit rather than a research publication. Together, these sources support describing royal agave, a shrub in the Asparagaceae family, as favorably rated for fire performance. They do not support turning that practical guidance into a settled yes-or-no finding of fire resistance.
Form
shrub
Rated in
California; Georgetown, Texas
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.
Sun City Texas, Georgetown (TX footprint); partial normalized coverage · 2015-01-14
The guide is authored for the Sun City Texas community in Georgetown. FireApproved publishes 142 exact owners only as community-level context. It is an archived HOA exhibit with unknown rating lineage, not a current statewide Texas source or an independent Tier 1 determination.
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)
Firewise Plant Guide: Yuccas/Agaves/Succulents/Cacti/Sotols [Sun City plant-table sections] (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.
The table rates Agave, Queen Victoria — Agave victoriae-reginae very low for flammability hazard, defined as the ease a plant can burn at high temperatures for a prolonged time.
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 7,10,53)”
The Diablo Firesafe Council Guide to Plants lists Agave victoriae-reginae (Agave) as shrub, succulent, in Table 1: plants with a favorable fire performance rating in 3 or more references. The guide cites 3 of its 57 numbered references for this row (7,10,53). 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.
