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Trailing iceplant is rated fire resistant, though the primary evidence behind that verdict is limited.
The Los Angeles State & County Arboretum placed Lampranthus spectabilis in its highest fire-retardance category. That category covers succulents with 90–95 percent leaf moisture under normal garden conditions at the Arboretum. The rating came from Southern California field work and reflects the plant’s capacity to hold moisture in its leaves.
The Diablo Firesafe Council also lists trailing iceplant among plants receiving favorable fire-performance ratings from three or more references. That agreement supports the Arboretum’s result, but it needs some care: the council says the ranking terms used by most of its underlying references were undefined. Its list gathers earlier judgments rather than adding another field trial with a shared testing scale.
Taken together, the findings support treating trailing iceplant as a fire-resistant succulent groundcover. The clearest reason is its high leaf-moisture capacity under the garden conditions studied, while the limited primary testing leaves less certainty about performance under other conditions.
Form
succulent
Rated in
California; Southern California
On this lot
1. Fire evidence and conditions
Fire evidence
Fire-resistant — 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.
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.
Conditions in the fire evidence
These describe tested or rated plant material. They are not horticultural maintenance instructions.
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.
Fire-Retardant Plants for Brush Fire Prevention in Hillsi…: Category 1 [la-arboretum-1970-leaf-moisture-fire-retardance] (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.
“CATEGORY 1 — GREATEST FIRE RETARDANCE Succulents (moisture content 90-95%)”
· condition: green
Lampranthus spectabilis (Trailing Ice Plant) is one of 30 low-growing plants in the source's recommended Table 1. The category reflects leaf moisture capacity under normal garden conditions at the Arboretum.
Corroboration (1 rows from 1 source)
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 ,9,10,11,22,24,25,38,42,53)”
The Diablo Firesafe Council Guide to Plants lists Lampranthus spectabilis (Trailing ice plant) as groundcover, succulent, in Table 1: plants with a favorable fire performance rating in 3 or more references. The guide cites 10 of its 57 numbered references for this row (7 ,9,10,11,22,24,25,38,42,53). 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.