United States / Grow / gray sheoak

gray sheoak

Casuarina glauca · Casuarinaceae · all Casuarina records · also called Casuarina glauca · Wikipedia

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Is this one for your yard?

Enter your ZIP to see whether this is legal to plant in your state, and whether it survives your winter.

Form
tree
Mature height
~60 ft
Water need
moderate
Rated in
Australia; Global
On this lot

1. Fire evidence and conditions

Fire evidence
Mixed evidence — location does not change the cited classification.
Evidence regions
Australia; Global

2. Why this plant is relevant here

State distribution
Documented in FL, HI.
Introduced / established
2 sourced range or established records. This is not an invasive warning.
USDA hardiness
Documented minimum 8b; no upper limit is documented.

3. Legal, ecological, and broader status

Reported invasive here
2 ecological invasive reports.
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.

Native and introduced range evidence

These are exact U.S. botanical-area records from the cited range source. Native and introduced describe biogeographic relationship, not fire performance or planting approval. Doubtful and extinct rows stay visible but do not count as current presence.

Current native

0

exact source areas

Current introduced

2

exact source areas

Qualified

0

doubtful or extinct source rows

2 introduced source areas · World Checklist of Vascular Plants, version 16 v16, as of 2026-06-04
  • Florida (FL)
  • Hawaii (HI)

The lossless worldwide derivative is retained once in the research corpus; object pages repeat only exact U.S. areas needed by the local lens. The JSON twin carries the same page assertions.

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.

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.

Recommends (1)

Corroboration (1 rows from 1 source)
Listed without a rating (2)
Corroboration (2 rows from 1 source)
  • FLAMITS: FLAMmability plant traiTS database — Dryad / Global Ecology and Biogeography · Dryad version 9 · original source Corroboration Trait database lineage: meta-aggregator

    2 cited rows from this source; its identity, lineage and tier are stated once.

    • Primary study Gill1996: Gill, M., & Moore, P. (1996). Ignitibility of leaves of Australian plants. Centre for Plant Biodiversity Research, CSIRO Plant Industry.

      Shared row context: Ignitability measurement; plant part leaves; fuel live; device muffle furnace; site Gill1996-1; sampling march to april.

      • “time to flaming (s): 43.02”

        FLAMITS record 3824; predrying no.

      • “time to flaming (s): 10.53”

        FLAMITS record 3872; predrying yes.

Fire-resistant trees instead

Last verified 2026-08-25. JSON (CC BY 4.0)

Profiles: USDA PLANTS · GBIF · iNaturalist · Wikidata · Wikipedia · ITIS

Casuarina glauca (Casuarina glauca). FireApproved. https://fireapproved.com/plants/casuarina-glauca/. Last verified 2026-08-25.