United States / Grow / silkoak

silkoak (Grevillea robusta)
Photo: (c) Jane C Frost, some rights reserved (CC BY) (CC BY), via iNaturalist. Species-typical, not necessarily this cultivar.

silkoak

Grevillea robusta · Proteaceae · all Grevillea records · also called Silky Oak · 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.

Grevillea robusta has a keep away recommendation. Its 2 ecological invasive reports remain a separate evidence dimension. That is not one slogan on Grevillea robusta. Silky Oak is the vernacular name attached to Grevillea robusta.

Grevillea robusta still has same form alternatives after that lead pair. Grevillea robusta does not pick only one of those facts on Grevillea robusta.

Open the evidence table for Grevillea robusta; related plants cited for Grevillea robusta. Those jumps stay with Grevillea robusta rather than copying rows.

Fire-resistant trees instead

Form
tree
Mature height
~105 ft
Water need
moderate
Rated in
New Zealand; Tasmania, Australia
On this lot

1. Fire evidence and conditions

Fire evidence
Highly flammable — location does not change the cited classification.
Placement evidence
1 source placement record; source schemes remain separate.
Evidence regions
New Zealand; Tasmania, Australia

2. Why this plant is relevant here

State distribution
Documented in FL, HI, PR.
Introduced / established
3 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

3

exact source areas

Qualified

0

doubtful or extinct source rows

3 introduced source areas · World Checklist of Vascular Plants, version 16 v16, as of 2026-06-04
  • California (CA)
  • 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.

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.

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 (2)

Fire-resistant trees instead

Fire-resistant trees listed above

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

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

Grevillea robusta (Silky Oak). FireApproved. https://fireapproved.com/plants/grevillea-robusta/. Last verified 2026-08-23.