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Giant dogwood

Cornus controversa · Cornaceae · all Cornus records

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: Fire-resistant — location does not change the cited classification.
Fire-performance conditions: No test or rating condition is normalized.
Fire ecology context: No section-reviewed fire-ecology context is normalized.
Placement evidence: 2 source placement records; source schemes remain separate.
Evidence regions: Global; Japan; eastern US
Maintenance: No sourced horticultural maintenance assertion is normalized; fire-test conditions do not supply maintenance advice.

2. Why this plant is relevant here

State distribution: Documented in DC, DE, MD, NJ, OH, PA, WV.
Native range: No current cited or legacy state native range is normalized.
Introduced / established: No introduced or established row is normalized; that does not prove native status.
USDA hardiness: Only uncertain or inapplicable hardiness rows are cited; no primary zone is projected.

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.

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.

Giant dogwood (Cornus controversa) — Photo: (c) Courtney Tregurtha-Nairn, some rights reserved (CC BY) (CC BY), via iNaturalist. Species-typical, not necessarily this cultivar.

Form: tree
USDA hardiness: Only uncertain or inapplicable source rows; no primary zone projected
Mature height: ~50 ft
Light: Full sun
Grows in: DC, DE, MD, NJ, OH, PA, WV
Rated in: Global; Japan; eastern US
Family: Cornaceae
Evidence: 6 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.

Eastern United States Fire Performance Plant Selector · record cornus-controversa · 2016-wayback · as of 2026-08-26

Source prints 5 · single-value meaning unresolved · whole zone precision · source stated

Source taxon: Cornus controversa · 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.

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 recommendation)
Tree fire-protection classification in Hito to Shinrin: ミズキ — Table 10-2 [tadaki-kira-1982-fire-protection-power] (mid-scale 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.

Mid-scale / conditional (1)

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 source Primary evidence Expert-curated lineage: independent (root of Japanese municipal fire-protection tree lists)

“中” · score 2 (tadaki-kira-fire-protection-power-0-3)

Table 10-2 prints ミズキ 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 (4)

FLAMITS: FLAMmability plant traiTS database — Dryad / Global Ecology and Biogeography · Dryad version 9 · original source Corroboration Trait database lineage: meta-aggregator

4 cited rows from this source; its identity, lineage and tier are stated once.
- “maximum energy flux (kW/m²): 296.59” · score 296.59 (FLAMITS — maximum energy flux (kW/m²))
  
  FLAMITS record 12399; Combustibility measurement; plant part wood; fuel dead; predrying yes; device calorimeter; site Seo2016-1; sampling ND. Primary study Seo2016: Seo, H.J., Park, J.-E., & Son, D.W. (2016). Combustion and thermal characteristics of Korean wood species. BioResources, 11, 7537-7550.
- “total heat release (MJ/m²): 1063.06” · score 1063.06 (FLAMITS — total heat release (MJ/m²))
  
  FLAMITS record 12400; Combustibility measurement; plant part wood; fuel dead; predrying yes; device calorimeter; site Seo2016-1; sampling ND. Primary study Seo2016: Seo, H.J., Park, J.-E., & Son, D.W. (2016). Combustion and thermal characteristics of Korean wood species. BioResources, 11, 7537-7550.
- “time to flaming (s): 33” · score 33 (FLAMITS — time to flaming (s))
  
  FLAMITS record 12401; Ignitability measurement; plant part wood; fuel dead; predrying yes; device calorimeter; site Seo2016-1; sampling ND. Primary study Seo2016: Seo, H.J., Park, J.-E., & Son, D.W. (2016). Combustion and thermal characteristics of Korean wood species. BioResources, 11, 7537-7550.
- “burnt biomass (%): 95.15” · score 95.15 (FLAMITS — burnt biomass (%))
  
  FLAMITS record 12402; Consumability measurement; plant part wood; fuel dead; predrying yes; device calorimeter; site Seo2016-1; sampling ND. Primary study Seo2016: Seo, H.J., Park, J.-E., & Son, D.W. (2016). Combustion and thermal characteristics of Korean wood species. BioResources, 11, 7537-7550.

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

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Cornus controversa (Giant dogwood). FireApproved. https://fireapproved.com/plants/cornus-controversa/. Last verified 2026-08-23.