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Silverbush is rated favorably for fire performance, but the sources do not establish a settled fire-resistant verdict.
The ACT Government marks Convolvulus cneorum “Fire Retardant: Yes” in its public plant selector for the Australian Capital Territory. That selector uses a simple Yes-or-No fire-retardant attribute, so it gives silverbush a favorable label without placing it on a finer scale of resistance.
The Diablo Firesafe Council also places silverbush, called bush morning glory there, in its table of plants with favorable fire-performance ratings in at least three references. It cites 11 of the guide’s 57 numbered references for this shrub. However, the council says that the ranking terms used in most of those references were undefined. Its threshold shows repeated favorable judgments, but those judgments do not necessarily use one shared meaning of fire performance.
Both sources therefore point in an encouraging direction, but they do so through different systems: one applies a binary attribute, while the other gathers favorable ratings from multiple references whose terms were mostly undefined. Silverbush is a shrub in the Convolvulaceae family, and the available findings support considering it fire retardant. They do not justify treating that label as proof of resistance under every fire condition.
Form
shrub
Region
Australian Capital Territory, Australia
Rated in
Australian Capital Territory, Australia; California
On this lot
1. Fire evidence and conditions
Fire evidence
Mixed evidence — location does not change the cited classification.
The guide presents itself as fire performance ratings for common landscape plants in a fire-prone California setting. FireApproved publishes 104 exact owners as republished California context. It is not an independent rating, a current endorsement, or parcel suitability.
2. Why this plant is relevant here
State distribution
Native range
Introduced / established
USDA hardiness
3. Legal, ecological, and broader status
Legal-list status
Seed-list status
Reported invasive here
Broader regional context
Federal context
Plant-specific legal-list reviews (1)
These source-bound review receipts are separate from ecological invasive reports. A source or plant identity change invalidates a receipt.
UT · Legal-list scope unresolved. A genus, compound, hybrid, cultivar, abbreviated, exception-bearing, or otherwise unresolved source row could cover this plant, so no negative result is published. Authority: Utah Department of Agriculture and Food; scope: state; as of 2026-08-26.Official reference.Normalized source record.
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.
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.
Canberra Plant Selector: filtered result page 18 [canberra-selector] (with its recommendation)
Fire Performance of Common Plants: Table 1 (favorable in 3 or more references) [diablo-guide-to-plants-three-reference-vote] (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.
The live Canberra Plant Selector marks “Convolvulus cneorum” as “Fire Retardant: Yes.”
Fire Performance of Common Plants (Guide to Plants) — Diablo Firesafe Council · live page captured 2026-08-29 · original sourceCorroborationMirrorlineage: ucfpl-berkeley resolves to Defensible Space Landscaping in the Urban/Wildland Interface: A Compilation of Fire Performance Ratings of Residential Landscape Plants
“Table 1: favorable fire performance rating in 3 or more references (refs 8,9,11,12,30,32,39,40,41,42,53)”
The Diablo Firesafe Council Guide to Plants lists Convolvulus cneorum (Bush morning glory) as shrub, evergreen, in Table 1: plants with a favorable fire performance rating in 3 or more references. The guide cites 11 of its 57 numbered references for this row (8,9,11,12,30,32,39,40,41,42,53). The guide states the ranking terms in its underlying references were mostly undefined and makes no attempt to rank within the list, and that fire performance is compromised without maintenance.
