Enter your ZIP to see whether this is legal to plant in your state, and whether it survives your winter.
Cupressus arizonica var. arizonica first cites Valette 1990. A second selected laboratory lineage, The ignition index, has its own evidence row. The two short labels remain separate, and the record preserves a green condition under test conditions.
The computed result remains avoid on the evidence table. Two hardiness assertions are kept under hardiness evidence, where they answer a different question from the fire lineages and their green condition. If the avoid result changes the planting choice, related plants provides cited same-form alternatives without extending either laboratory source beyond this record.
Sun City Texas, Georgetown (TX footprint); partial normalized coverage · 2015-01-14
The guide is authored for the Sun City Texas community in Georgetown. FireApproved publishes 142 exact owners only as community-level context. It is an archived HOA exhibit with unknown rating lineage, not a current statewide Texas source or an independent Tier 1 determination.
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.
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, DC, DE, MD, NJ, NM, NV, OH, PA, PR, TX, UT, WV.
Native range
Introduced / established
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 6 · single-value meaning unresolved · whole zone precision · source stated
Source taxon: Cupressus arizonica var. arizonica · 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 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 Plant Guide: Avoid if Possible [Sun City plant-table sections] (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.
Listed as Arizona Cypress — Cupressus arizonica. The bulletin says fire-resistant plants tend to resist ignition when irrigated and maintained, while fire-prone plants may ignite readily and burn intensely.
The table rates Cypress, Arizona — Cypressus arizonica high for flammability hazard, defined as the ease a plant can burn at high temperatures for a prolonged time.
Listed without a rating (35)Corroboration (35 rows from 1 source)
35 cited rows from this source; its identity, lineage and tier are stated once.
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 3729; Sustainability measurement; fuel live; predrying no.
Primary study Ganteaume2021a: Ganteaume, A., Romero, B., Fernandez, C., Ormeño, E., & Lecareux, C. (2021). Volatile and semi-volatile terpenes impact leaf flammability: differences according to the level of terpene identification. Chemoecology, 31, 259-275.
Shared row context: plant part leaves; fuel live; predrying no; device epiradiator; site Ganteaume2021a-1; sampling january to februaty and april to may.
Primary study Ganteaume2021b: Ganteaume, A., Romero, B., Ormeño, E., Lecareux, C., & Fernandez, C. (2021). Does Seasonality of Leaf Terpene Content and Moisture Content Trigger Leaf Flammability Seasonal Variation? in review, preprint.
Shared row context: plant part leaves; fuel live; predrying no; device epiradiator; site Ganteaume2021b-1.
“time to flaming (s): 40.62”
FLAMITS record 3776; Ignitability measurement; sampling winter.
“time to flaming (s): 34.94”
FLAMITS record 3777; Ignitability measurement; sampling spring.
“time to flaming (s): 40.9”
FLAMITS record 3778; Ignitability measurement; sampling summer.
“maximum flame temperature (°C): 442.06”
FLAMITS record 3788; Combustibility measurement; sampling winter.
“maximum flame temperature (°C): 532.62”
FLAMITS record 3789; Combustibility measurement; sampling spring.
“maximum flame temperature (°C): 455.62”
FLAMITS record 3790; Combustibility measurement; sampling summer.
“flaming duration (s): 6.97”
FLAMITS record 3800; Sustainability measurement; sampling winter.
“flaming duration (s): 9.58”
FLAMITS record 3801; Sustainability measurement; sampling spring.
“flaming duration (s): 11.02”
FLAMITS record 3802; Sustainability measurement; sampling summer.
Primary study Molina2017: Molina, J. R., Martín, T., Rodríguez Y Silva, F., & Herrera, M. Á. (2017). The ignition index based on flammability of vegetation improves planning in the wildland-urban interface: A case study in Southern Spain. Landscape and Urban Planning, 158, 129-138.
Shared row context: plant part leaves; fuel live; predrying no; device epiradiator; site Molina2017-1; sampling summer.
Primary study Romero2019: Romero, B., Fernandez, C., Lecareux, C., Ormeño, E., & Ganteaume, A. (2019). How terpene content affects fuel flammability of wildlandurban interface vegetation. International Journal of Wildland Fire, 28, 614.
Shared row context: device epiradiator; site Romero2019-1; sampling july.
FLAMITS record 11368; Combustibility measurement; plant part leaves; fuel live; predrying no.
“flaming duration (s): 11.1”
FLAMITS record 11375; Sustainability measurement; plant part leaves; fuel live; predrying no.
Primary study Valette1990: Valette, J.-C. (1990). Flammabilities of Mediterranean forest species. Effects on the combustibility of the forest communities inflammabilités des espèces forestières méditerranéennes. Conséquences sur la combustibilité des formations forestières. Revue forestière française, 42, 76-92.
Shared row context: Ignitability measurement; plant part leaves; fuel live; predrying no; device epiradiator; site Valette1990-1; sampling june to september.
