Enter your ZIP to see whether this is legal to plant in your state, and whether it survives your winter.
Small-leaf pussytoes is rated fire resistant, including a Colorado score that meets the source's defensible-space selection rule.
The Colorado extension and forest service table assigns Antennaria parvifolia an eight out of ten. Its rule for Zones 1 and 2 calls for scores of eight through ten, placing this groundcover within the recommended group. Idaho Firewise also prints an eight. Colorado credits Idaho materials for its scoring approach, so the matching results have a source relationship.
Oregon State profiles small-leaf pussytoes for fire-resistant planting under Willamette Valley growing conditions. Fremont County includes it among Firewise ground covers and describes its selected plants collectively as generally low-growing, relatively moist and low in debris.
The numbers answer a different question from the regional lists. Colorado supplies a score and a selection threshold; Oregon supplies a recommendation linked to growing conditions; Fremont supplies a favorable landscape listing. Together they support the fire-resistant assessment without turning the two eights into independent experimental results.
Form
groundcover
Rated in
Colorado / Rocky Mountain Front Range; Fremont County, Wyoming; Oregon (Willamette Valley); southern Idaho / Intermountain
On this lot
1. Fire evidence and conditions
Fire evidence
Fire-resistant — location does not change the cited classification.
Colorado State University Extension and the Colorado State Forest Service publish Fact Sheet 6.305 for Colorado's WUI and varied ecosystems. FireApproved exposes all 114 exact source owners at Colorado publication scope while retaining score, elevation, water, and Idaho-carrier lineage. Publication scope is not suitability for every Colorado site or zone.
Fremont County (WY footprint); partial normalized coverage · 2011-02-25
The source identifies itself as the Fremont County Firewise Plant List. FireApproved publishes its 92 exact source owners as Fremont County regional context. No methodology, current county endorsement, statewide Wyoming scope, or site-specific suitability is inferred.
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.
Willamette Valley (OR footprint); partial normalized coverage · 2015-02-01
OSU Extension says EM 9103 highlights fire-resistant plants that thrive under Willamette Valley growing conditions. FireApproved publishes 172 exact owners only as valley context. The guide shares the PNW 590 lineage and is not a second independent vote or statewide site clearance.
2. Why this plant is relevant here
State distribution
Documented in AZ, CA, CO, ID, KS, MI, MN, MT, ND, NE, NM, NV, OK, OR, SD, TX, UT, WA, WY.
Native range
Current cited native range in AZ, CO, IA, ID, MI, MN, MT, ND, NE, NM, NV, OR, SD, TX, UT, WA, WY.
Introduced / established
USDA hardiness
Documented range 4–7.
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.
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.
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.
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 30' from home [Idaho minimum planting distance] (with its recommendation)
Fire-resistant Landscape Plants for the Willamette Valley: Small-leaf Pussytoes profile (PDF page 91) [osu-em-9103-profile] (with its recommendation)
Ignition-Resistant Landscape Plants: suitable for defensible-space zones 1-2 (score 8+) [CSU defensible-space zone] (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.
“fire-resistant plants that thrive in Willamette Valley growing conditions”
The perennials profile lists Antennaria parvifolia as Small-leaf Pussytoes. The profile prints USDA Hardiness Zone: 4–7.
Ignition-Resistant Landscape Plants (Fact Sheet 6.305) — Colorado State University Extension / Colorado State Forest Service (Wildfire Mitigation Series) · 2025 · original sourcePrimary evidenceField programlineage: idaho-tree resolves to Fire Resistance of Plants Master Database
“ignitability score 8 of 10”
· score 8 (idaho-0-10)
CSU 6.305 table lists Antennaria parvifolia (small-leaf pussytoes) with the preserved ignitability score.
“Fremont County Firewise Plant List — Antennaria parvifolia — Small-Leaf Pussytoes”
Listed in the source's Ground Covers section; the page describes its listed Firewise plants as generally low-growing, low-debris, and relatively moist.
