Enter your ZIP to see whether this is legal to plant in your state, and whether it survives your winter.
Japanese cheesewood's fire-resistant rating has support from whole-plant burns, despite a warning from Firewise programs.
Five of six published assessments favor the shrub. The USDA Forest Service Southern Research Station and NIST placed it in a low-flammability cluster after whole-plant burns. A French study testing live leaves for ignition frequency, ignition time, and flaming duration classified it as poorly flammable and fire-wise. Those tests approach flammability from different angles: one burns the whole shrub, while the other measures how its leaves ignite and continue flaming.
The opposing judgment comes from the USDA Forest Service Northeastern Area and state Firewise programs. Their four-band selector gives Japanese cheesewood the lowest rating, “Not Firewise,” and points to its waxy, thick foliage. By contrast, agencies in Valencia and Catalonia recommend it for fire-conscious gardens, with the Catalan recommendation assuming species-specific care and weighing fuel structure, maintenance, origin, invasiveness, and fire-service experience. Fire Safe Marin likewise lists it as fire resistant but stresses that placement, spacing, irrigation, and removal of dead material still matter.
On balance, Japanese cheesewood qualifies as fire resistant, supported by both laboratory findings and garden guidance, but that label does not make its placement or upkeep irrelevant.
Form
shrub
Mature height
~3 ft
Light
Full sun
Water need
moderate
Rated in
California; Catalonia, Spain; Global; Japan +5
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.
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.
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
Documented in CA, DC, DE, FL, GA, MD, NC, NJ, OH, PA, WV.
Native range
Introduced / established
4 sourced range or established records. This is not an invasive warning.
USDA hardiness
Documented minimum 7b; no upper limit is documented.
3. Legal, ecological, and broader status
Legal-list status
Seed-list status
Reported invasive here
1 ecological invasive report.
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.
Source prints 7 · single-value meaning unresolved · whole zone precision · source stated
Source taxon: Pittosporum tobira · exact match.
Source location: Cold Hardiness Zone field in the recovered selector record.
Not used for comparison: The recovered selector prints one Cold Hardiness Zone value but does not define it as a minimum threshold or a one-zone range.
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.
Eastern United States Fire Performance Plant Selector: Landscape Zone 2 — 5–10 ft from the structure; maintained lawn or fuel breaks, with easily ignited evergreens avoided [Fire Performance Plant Selector landscape zone] (with its avoid rating)
Guía de pirojardinería: suitable inside or outside the 25-metre maximum-risk zone [girona-2020-iuf-25m-suitability] (with its recommendation)
Tree fire-protection classification in Hito to Shinrin: トベラ — Table 10-2 [tadaki-kira-1982-fire-protection-power] (mid-scale rating)
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.
Pittosporum tobira 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.
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 11,12,25,40,41)”
The Diablo Firesafe Council Guide to Plants lists Pittosporum tobira (Mock orange, Wheeler's mock orange) as shrub, evergreen, in Table 1: plants with a favorable fire performance rating in 3 or more references. The guide cites 5 of its 57 numbered references for this row (11,12,25,40,41). 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.
Tree fire-protection classification in Hito to Shinrin (人と森林) — Kyoritsu Shuppan; table reproduced by Kagoshima Prefecture · Hito to Shinrin (1982), Table 10-2; Kagoshima web reproduction · original sourcePrimary evidenceExpert-curatedlineage: independent (root of Japanese municipal fire-protection tree lists)
Table 10-2 prints トベラ in the medium fire-protection-power class. The Kagoshima reproduction says highly fire-protective trees can slow spread, promote upward dispersal of heat and smoke, and intercept flying embers.
Listed without a rating (18)Corroboration (18 rows from 1 source)
18 cited rows from this source; its identity, lineage and tier are stated once.
Primary study Ganteaume2012: Ganteaume, A., Jappiot, M., & Lampin, C. (2012). Assessing the flammability of surface fuels beneath ornamental vegetation in wildlandurban interfaces in Provence (south-eastern France). International Journal of Wildland Fire, 22, 333.
Shared row context: plant part litter; fuel all; predrying yes; device burning bench; site Ganteaume2012-1; sampling summer.
Primary study Ganteaume2013: Ganteaume, A., Jappiot, M., Lampin, C., Guijarro, M., & Hernando, C. (2013). Flammability of some ornamental species in wildland-urban interfaces in southeastern France: laboratory assessment at particle level. Environmental Management, 52, 467-80.
Shared row context: plant part leaves; fuel live; predrying no; device epiradiator; site Ganteaume2013-1; sampling summer.
Primary study Ganteaume2018: Ganteaume, A. (2018). Does plant flammability differ between leaf and litter bed scale? Role of fuel characteristics and consequences for flammability assessment. International Journal of Wildland Fire, 27, 342-352.
Shared row context: plant part leaves; device epiradiator; site Ganteaume2018-1; sampling summer.
FLAMITS record 3737; Sustainability measurement; fuel live; predrying no.
Primary study Kauf2014: Kauf, Z., Fangmeier, A., Rosavec, R., & panjol, . (2014). Testing Vegetation Flammability: The Problem of Extremely Low Ignition Frequency and Overall Flammability Score. Journal of Combustion, 2014, 1-10.
Shared row context: plant part litter; fuel all; predrying no; device epiradiator; site Kauf2014-1; sampling may.
