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Jojoba has favorable regional listings, but its fire resistance is not settled by the available evidence.
The Yavapai County plant bulletin lists Simmondsia chinensis as jojoba among fire-resistant choices. Its recommendation explicitly requires irrigation and frequent maintenance. Fire Safe Marin also includes jojoba, with the same emphasis on water and upkeep. Neither favorable listing makes those conditions optional.
Diablo Firesafe Council approaches the question through earlier references. Its jojoba row cites 7 references with favorable fire-performance findings. The council explains that the older ranking terms were often undefined and lacked an agreed standard definition, so it does not rank these plants against one another. The count records published support without putting jojoba on a common measured scale.
For a gardener, these listings make jojoba worth considering under their stated conditions. They support a narrower conclusion than a settled fire-resistance rating: favorable regional guidance exists, and its practical value depends on suitable placement, irrigation, and continued maintenance.
Form
shrub
Mature height
~7 ft
Water need
low
Rated in
California; Marin County, California; Yavapai County, Arizona
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.
Marin County (CA footprint); partial normalized coverage · 2019-01-01
The publication is explicitly limited to plants common to Marin County. FireApproved publishes 104 exact owners as Marin regional context while retaining its placement, spacing, irrigation, and maintenance boundary. It is not statewide California guidance or parcel suitability.
Yavapai County (AZ footprint); partial normalized coverage · 2025-03-14
University of Arizona Cooperative Extension authors Bulletin 34 for Yavapai County. FireApproved publishes 198 exact source owners from its resistant and prone tables and keeps the county boundary visible. County publication scope is regional Arizona context, never statewide scope.
2. Why this plant is relevant here
State distribution
Documented in AZ, CA, UT.
Native range
Current cited native range in AZ, CA, NM, UT.
Introduced / established
USDA hardiness
Documented minimum 6b; no upper limit is documented.
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.
Plant hardiness evidence
These values describe the plant source. Your ZIP zone comes from the separate 2023 USDA
Plant Hardiness Zone Map. Whole-zone values stay whole-zone, and a single unresolved value
is not treated as a tolerance range. Different source boundaries stay separate: overlapping
statements are compared independently, while only ranges with no shared zone are called a conflict.
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 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.
Listed as Jojoba — Simmondsia chinensis. The bulletin says fire-resistant plants tend to resist ignition when irrigated and maintained, while fire-prone plants may ignite readily and burn intensely.
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 9,11,15,40,41,42,53)”
The Diablo Firesafe Council Guide to Plants lists Simmondsia chinensis (Pignut, Jojoba, Goatnut) as shrub, evergreen, 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 (9,11,15,40,41,42,53). 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.
