Home / Plants / Grow / River Sheoak
River Sheoak
Allocasuarina cunninghamiana
Your local evidence lens
Separate evidence questions, never one approval badge
A genus split is not a placement verdict. Set a ZIP to read the local documented split.
1. Fire evidence and conditions
- Fire evidence
- Highly flammable — 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
- Cape Town, Western Cape, South Africa; Tasmania, Australia
- 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 FL, PR.
- 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
- Documented minimum 9a; no upper limit is documented.
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
- 2 ecological invasive reports; set a location to distinguish exact from regional context.
- 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.
- Form
- tree
- USDA hardiness
- Minimum 9a; upper limit not documented
- Mature height
- ~100 ft
- Water need
- moderate
- Grows in
- FL, PR
- Rated in
- Cape Town, Western Cape, South Africa; Tasmania, Australia
- Family
- Casuarinaceae
- Evidence
- 2 cited sources
Plant hardiness evidence
-
USDA PLANTS Database — Plant Characteristics
Minimum 9a · no upper limit documented
Where its sources say to plant it
- Fire Resisting Garden Plants for the Urban Fringe and Rur…: remove from the Building Protection Zone; avoid in the Fuel Modified Zone
- Time to extinguish the exotic flame: Lessons from the 202…: Urban zone; Table 1 and deposited raw workbook
The evidence
Avoids (1)
-
Fire Resisting Garden Plants for the Urban Fringe and Rural Areas
“High Flammability”
Mid-scale / conditional (1)
-
Time to extinguish the exotic flame: Lessons from the 2021 Cape Town fire
“Partially burned”
Official-workbook means across 50 leaf trials: fresh ignition 8.458 s, fresh sustainability 16.999 s, dry ignition 1.668 s, dry sustainability 20.405 s, and combustibility 2.435 mg DW s-1. Published Table 1 observation for the 2021 fire: Partially burned.
