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Blue-mist spirea

Caryopteris x clandonensis (accepted: Caryopteris clandonensis) · Lamiaceae · syn. Caryopteris xclandoensis

Your local evidence lens

Separate evidence questions, never one approval badge

Set a ZIP to compare this record with state distribution, native range, USDA hardiness, and invasive records.

A genus split is not a placement verdict. Set a ZIP to read the local documented split.

1. Fire evidence and conditions

Fire evidence: Mixed evidence — location does not change the cited classification.
Fire-performance conditions: 1 condition stated in cited fire-evidence rows.
Fire ecology context: No section-reviewed fire-ecology context is normalized.
Placement evidence: 5 source placement records; source schemes remain separate.
Evidence regions: British Columbia; Michigan / Great Lakes; Nevada / Great Basin; OR/WA/ID; Oregon; Pacific Northwest (Oregon / Washington / Idaho); Yavapai County, Arizona; eastern US; southern Idaho / Intermountain
Maintenance: No sourced horticultural maintenance assertion is normalized; fire-test conditions do not supply maintenance advice.

Typed publication scope: 5 scopes across 5 cited fire sources

Fire Resistance of Plants Master Database · Official scoped edition
- Southern Idaho (ID footprint); partial normalized coverage · 2013-11-08
  The official database labels itself "For Southern Idaho" and describes Idaho residents at the urban-rangeland interface. FireApproved publishes 419 existing plant owners that cite its scored rows. This bounded Southern Idaho scope is regional context, not statewide coverage or a conclusion that the score transfers unchanged to every Idaho site.
Wildfire-resistant Landscape Plants for Michigan (Extension Bulletin E2948) · Official scoped edition
- MI; partial normalized coverage · 2007-01-01
  Michigan State University Extension Bulletin E2948 is explicitly a list of wildfire-resistant landscape plants for Michigan and includes a Michigan-native field. FireApproved publishes 221 exact GBIF owners from 226 represented source rows and holds 15 complex or non-exact rows. This dated publication scope is not a current site-suitability determination.
Fire-Resistant Plants for Home Landscapes (PNW 590) · Official scoped edition
- ID, OR, WA; partial normalized coverage · 2023-10-01
  The October 2023 joint Pacific Northwest Extension publication explicitly names Oregon, Washington, and Idaho and publishes more than 150 plant profiles. FireApproved has normalized 155 exact plant records from the source; publication scope does not assert that every listed plant suits every site within the three states.
A Compilation of Good Plant Choices for Nevada's High Fire Hazard Areas (SP-05-16) · Official scoped edition
- NV; partial normalized coverage · 2005-01-01
  University of Nevada Cooperative Extension compiled plants suited to Nevada climate zones and reported favorably by at least two upstream firewise lists. FireApproved publishes 126 exact source owners at Nevada publication scope. The source explicitly makes no independent flammability determination, so these rows remain corroborative.
Fire-Resistant and Fire-Prone Plants Common to Yavapai County (Bulletin 34) · Official scoped edition
- 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 ID, OR, WA.
Native range: No current cited or legacy state native range is normalized.
Introduced / established: 1 sourced range or established record; set a location to match them. This is not an invasive warning.
USDA hardiness: 2 applicable cited hardiness statements overlap but have different boundaries; compare each complete source row.

3. Legal, ecological, and broader status

Legal-list status: Set a location for an exact legal-list result; source silence is not clearance.
Seed-list status: Set a location to compare the separate state noxious-weed seed layer.
Reported invasive here: No ecological invasive report is normalized; that does not prove noninvasiveness.
Broader regional context: Aggregate AK, HI, and L48 evidence is shown only as regional context, never as an exact-state finding.
Federal context: Federal designations remain separate from state legal-list results.

Documented conflict. Curated sources lean toward recommending it (the PNW-590 regional list, the Eastern US Fire Performance Plant Selector and Michigan's E2948 list), but direct fire evidence disagrees (the Idaho Firewise field scores). Lab and field results are never outvoted by curation here — read both sides below and treat it conservatively near structures.

▲ the PNW-590 regional list ▲ the Eastern US Fire Performance Plant Selector ▲ Michigan's E2948 list ▼ the Idaho Firewise field scores · fire-tested

Computed class: Mixed evidence (disputed) — derived from the cited evidence by a published rule, never hand-assigned. Each chip above is one independent primary-evidence lineage and its direction. No plant is fireproof; condition and placement govern. Zone 0 is hardscape regardless.

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.

Blue-mist spirea (Caryopteris x clandonensis) — Photo: (c) Wolfgang Jauch, some rights reserved (CC BY) (CC BY), via iNaturalist. Species-typical, not necessarily this cultivar.

Form: shrub
USDA hardiness: Applicable source statements overlap but have different boundaries; compare each source
Grows in: ID, OR, WA
Rated in: British Columbia; Michigan / Great Lakes; Nevada / Great Basin; OR/WA/ID +5
Family: Lamiaceae
Evidence: 9 cited sources

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.

Wildfire-resistant Landscape Plants for Michigan (Extension Bulletin E2948) · record perennial:Caryopteris xclandonensis · New, January 2007 · as of 2026-08-26

5–9 explicit range · whole zone precision · source stated

Source taxon: Caryopteris xclandonensis · accepted name match.

Source location: Table 1, perennial row.
Fire-Resistant Plants for Home Landscapes (PNW 590) · record shrubs:Blue-mist spirea · 2023-10 · as of 2026-08-26

5–10 explicit range · whole zone precision · source stated

Source taxon: Caryopteris x clandonensis · exact match.

Source location: Blue-mist spirea profile, USDA hardiness zones field.

Conditions in the fire evidence

These describe tested or rated plant material. They are not horticultural maintenance instructions.

green: Fire-Resistant Plants for Oregon Home Landscapes evidence row

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.

Fire Resistance of Plants Master Database: plantable at 90' from home [Idaho minimum planting distance] (with its avoid rating)
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 recommendation)
FireSmart BC Plant Program: suitable for HIZ extended zone and beyond [FireSmart BC Home Ignition Zone] (with its recommendation)
Fire-Resistant Plants for Oregon Home Landscapes: Oregon [osu-frn6-oregon-regions] (with its recommendation)
Fire-resistant plant profile galleries: Blue-mist spirea — Caryopteris x clandonensis [osu-2023-shrubs-gallery] (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.

Avoids (1)

Fire Resistance of Plants Master Database — Idaho Firewise (BLM + College of Western Idaho + Idaho Botanical Garden) · original source Primary evidence Field program lineage: idaho-tree

“fire-resistance score 2 of 10” · score 2 (idaho-0-10)

Fire-resistant shrubs instead

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Fire-resistant shrubs listed above

Last verified 2026-08-23. JSON (CC BY 4.0)

Profiles: GBIF ·

Caryopteris x clandonensis (Blue-mist spirea). FireApproved. https://fireapproved.com/plants/caryopteris-x-clandonensis/. Last verified 2026-08-23.