Ceanothus griseus var. horizontalis (accepted: Ceanothus griseus) · Rhamnaceae · all Ceanothus records · also called Carmel creeper or ceanothus · syn. Ceanothus griseus var. horizontalis · Wikipedia
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Carmel ceanothus is rated fire resistant, but that rating depends in part on irrigation and careful maintenance.
The University of California’s extension service includes Carmel ceanothus among plants for fire protection on irrigated hillsides, provided fuel volume is minimized, the plant is watered to its needs, and accumulated litter is removed. Girona’s provincial government and Catalonia’s fire service also recommend Ceanothus griseus. Their broader garden-suitability judgment assumes species-specific care and weighs fire research alongside fuel structure, maintenance, origin, invasiveness, and firefighters’ experience.
The USDA Forest Service adds a more limited finding. Its field trial places Carmel creeper in the “Fair performance” section for shrubs planted on southern California brushland clearings. That classification covers field performance rather than flammability alone, so it supports the overall case without proving that the plant will resist fire under every landscape condition.
Taken together, the three independent sources favor treating this groundcover as fire resistant. The practical lesson is not that Carmel ceanothus can be planted and forgotten. Its favorable standing is strongest where irrigation, fuel reduction, and litter removal are maintained, which makes upkeep part of the fire-protection value rather than an optional extra.
Form
groundcover
Rated in
California; Catalonia, Spain
On this lot
1. Fire evidence and conditions
Fire evidence
Fire-resistant — location does not change the cited classification.
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.
Low-volume and slow-burning vegetation for planting on cl…: Table 3: Fair performance [nord-green-brushland-clearing-performance] (mid-scale rating)
Landscape for Fire Protection: irrigated hillsides [maire-1968-fire-protection-landscape] (with its recommendation)
Guía de pirojardinería: suitable inside or outside the 25-metre maximum-risk zone [girona-2020-iuf-25m-suitability] (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.
Ceanothus griseus horizontalis (Carmel creeper) appears in the source's conditioned examples for landscaping irrigated hillsides. Fuel volume is to be minimized, plants watered to their needs, and accumulated litter removed.
Ceanothus griseus is rated “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.
Ceanothus griseus var. horizontalis (Carmel creeper or ceanothus). FireApproved. https://fireapproved.com/plants/ceanothus-griseus-var-horizontalis/. Last verified 2026-08-25.