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Chinese juniper is not fire resistant; four sources place it among plants to avoid because of high flammability.
The strongest direct finding comes from whole-plant burns conducted by the USDA Forest Service’s Southern Research Station with NIST. Chinese juniper fell into the high-flammability group, one of four such shrubs among 34 ornamentals tested. This matters more than a judgment based on appearance because the test burned the whole plant and measured its fire behavior with large-scale calorimetry.
Three landscape guides reach the same practical conclusion. Ohio State’s extension service gives Chinese juniper a VH rating, the top of its five-band flammability scale. Virginia Cooperative Extension rates it H on its three-point scale, while the Forest Service and state Firewise programs call it Not Firewise, the lowest category on their four-level scale. These assessments cover the Midwest, Mid-Atlantic, eastern, and southeastern United States, yet their advice is consistent.
A separate burning-bench measurement found that live, unpredried leaves had a calorific value of 4,995.22 kilocalories per kilogram. That figure describes the heat the leaves can release once burning; it does not by itself show how readily the whole shrub ignites. The whole-plant test and the three landscape ratings answer that practical question more directly. For a roughly 12-foot shrub being considered near a structure, Chinese juniper belongs elsewhere.
Ohio State University Extension Bulletin 921 is an Ohio publication that describes Ohio fire seasons and landscape conditions and labels nativity to Ohio. FireApproved publishes 352 exact source-owning plant records from its eight rated tables. This historical publication scope does not assert current extension endorsement or that a listed plant suits every Ohio site.
Virginia Cooperative Extension's publication opens with Virginia wildfire conditions, identifies its Virginia Firewise Landscaping Task Force, and labels plants native to Virginia. FireApproved publishes 306 exact source owners. Publication scope does not establish parcel suitability or current endorsement of this archived 2009 list.
2. Why this plant is relevant here
State distribution
Documented in DC, DE, MD, NJ, OH, PA, WV.
Native range
Introduced / established
1 sourced range or established record. This is not an invasive warning.
USDA hardiness
Documented minimum 5b; 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.
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 4 · single-value meaning unresolved · whole zone precision · source stated
Source taxon: Juniperus chinensis · 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.
Source location: PlantCharacteristics record 15162, Temperature, Minimum (°F).
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.
Eastern United States Fire Performance Plant Selector: Landscape Zone 3 — 10–30 ft from the structure; thin vegetation, remove debris, and minimize plant massing [Fire Performance Plant Selector landscape zone] (with its avoid rating)
Firewise Landscaping: do not plant within 5 ft of structures (keep out of Zone 1) [OSU B921 source-category siting] (with its avoid rating)
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.
18 cited rows from this source; its identity, lineage and tier are stated once.
Primary study Larsson1997: Larsson, M., & Lundqvist, M. (1997). Preliminary study on the role of moisture and extractives of ornamental plants on the flammability. Thesis dissertation. Lund University.
