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Ragwort shows some fire resistance, but the available findings do not support an unqualified yes.
The University of Georgia’s forestry guidance describes Senecio species as low-growing, low-flammability succulents that may grow within 0–5 feet of a structure if carefully maintained and limited in quantity. The South Carolina Forestry Commission also places dusty miller, a senecio, among less flammable plants with some fire resistance. Those are favorable findings, but both are qualified descriptions rather than claims that ragwort will not burn.
Idaho Firewise gives ragwort a fire-resistance score of 7 out of 10. Its scale connects higher scores with shorter acceptable planting distances, but 7 does not reach the 8–10 range used for a resistant recommendation. That helps explain the mixed conclusion: southeastern guidance accepts Senecio under careful management, while the Idaho score stops short of the strongest rating.
Ragwort is a perennial in the aster family, and the name covers Senecio species rather than one narrowly defined plant. The practical reading is that ragwort can be less flammable than plants classified as highly flammable, especially when its quantity and maintenance are controlled, but it should not be treated as clearly fire resistant on the strength of these findings alone.
Form
perennial
Rated in
Georgia; South Carolina; southern Idaho / Intermountain
On this lot
1. Fire evidence and conditions
Fire evidence
Mixed evidence — location does not change the cited classification.
Southern Idaho (ID footprint); partial normalized coverage · 2013-11-08
The official database labels itself "For Southern Idaho" and describes Idaho residents at the urban-rangeland interface. FireApproved publishes 419 existing plant owners that cite its scored rows. This bounded Southern Idaho scope is regional context, not statewide coverage or a conclusion that the score transfers unchanged to every Idaho site.
South Carolina Forestry Commission publishes this explicitly as its Fire Smart Plant List for South Carolina. FireApproved publishes 63 exact genus owners from 72 unique common-name labels; unsafe common-name mappings and duplicates are not broadened. The brochure calls the list non-inclusive and does not establish species-level or site-specific suitability.
UGA Warnell's WSFNR-20-96A is explicitly firescaping guidance for Georgia. FireApproved publishes the five exact genus owners named in its Immediate Zone examples while retaining the source's maintenance and quantity conditions. This is partial example coverage, not a statewide planting list.
2. Why this plant is relevant here
State distribution
Documented in GA, ID.
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
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.
Fire Resistance of Plants Master Database: plantable at 40' from home [Idaho minimum planting distance] (mid-scale rating)
Firescaping: Wildfire-Resistant Landscaping in Georgia: Immediate Zone (0–5 feet from structure) [uga-firescaping-zones] (with its recommendation)
Landscaping Can Be Attractive & FIREWISE: GROUNDCOVERS, BEDDING PLANTS, & VINES [SCFC Fire Smart plant-form sections] (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.
Listed as Dusty miller, senecio. The source says highly flammable plants ignite faster and burn readily; less flammable plants have some fire resistance.
