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.
The April 2022 MontGuide explicitly presents fire-resistant species adapted to Montana. FireApproved publishes 92 exact plant records from the source while retaining excluded genus, family, and unresolved rows; the guide itself says not every listed species grows in every part of the state.
Utah State University Extension states that this fact sheet selects examples for Utah landscapes and that they require proper placement and maintenance. FireApproved publishes 83 exact source owners at Utah publication scope. The table is not a site-specific planting clearance.
2. Why this plant is relevant here
State distribution
Documented in AK, AL, AR, AZ, CA, CO, CT, DC, DE, FL, GA, HI, IA, ID, IL, IN, KS, KY, LA, MA, MD, ME, MI, MN, MO, MS, MT, NC, ND, NE, NH, NJ, NM, NV, NY, OH, OK, OR, PA, PR, RI, SC, SD, TN, TX, UT, VA, VT, WA, WI, WV, WY.
Native range
Introduced / established
52 sourced range or established records. This is not an invasive warning.
USDA hardiness
Documented minimum 5a; no upper limit is documented.
3. Legal, ecological, and broader status
Legal-list status
Seed-list status
Reported invasive here
3 ecological invasive reports.
Broader regional context
Federal context
Plant-specific state seed-list reviews (7)
These source-bound receipts answer only the July 2026 state noxious-weed seed-list question.
This answers only whether the plant identity appears in the July 2026 state noxious-weed seed sheet. It does not establish non-seed plant legal status, ecological-invasive status, nursery-sale rules, or unrestricted use.
DE · Seed-list name scope unresolved. An exact source taxon is governed by “Restricted Noxious-Weed Seed in Lawn and Turf Seed and Mixtures” or an applicable source note, so the qualified row is held instead of publishing an unconditional result. Held source row: usda-ams-state-noxious-weed-seed-2026:DE:047. Governing seed section: Restricted Noxious-Weed Seed in Lawn and Turf Seed and Mixtures; normalized seed-kind scope: lawn and turf seed; applicable note rows usda-ams-state-noxious-weed-seed-2026:DE:036, usda-ams-state-noxious-weed-seed-2026:DE:051, usda-ams-state-noxious-weed-seed-2026:DE:052, usda-ams-state-noxious-weed-seed-2026:DE:053, usda-ams-state-noxious-weed-seed-2026:DE:055.Official USDA seed requirements.Normalized source record.
MD · Seed-list name scope unresolved. An exact source taxon is governed by “Restricted Noxious-Weed Seed in Lawn and Turf Seed and Mixtures” or an applicable source note, so the qualified row is held instead of publishing an unconditional result. Held source row: usda-ams-state-noxious-weed-seed-2026:MD:039. Governing seed section: Restricted Noxious-Weed Seed in Lawn and Turf Seed and Mixtures; normalized seed-kind scope: lawn and turf seed; applicable note rows usda-ams-state-noxious-weed-seed-2026:MD:031, usda-ams-state-noxious-weed-seed-2026:MD:043, usda-ams-state-noxious-weed-seed-2026:MD:044, usda-ams-state-noxious-weed-seed-2026:MD:045, usda-ams-state-noxious-weed-seed-2026:MD:052.Official USDA seed requirements.Normalized source record.
NH · Seed-list name scope unresolved. An exact source taxon is governed by “Undesirable Grass Seeds” or an applicable source note, so the qualified row is held instead of publishing an unconditional result. Held source row: usda-ams-state-noxious-weed-seed-2026:NH:037. Governing seed section: Undesirable Grass Seeds; normalized seed-kind scope: lawn and turf seed; applicable note rows usda-ams-state-noxious-weed-seed-2026:NH:029, usda-ams-state-noxious-weed-seed-2026:NH:041, usda-ams-state-noxious-weed-seed-2026:NH:043, usda-ams-state-noxious-weed-seed-2026:NH:045.Official USDA seed requirements.Normalized source record.
NJ · Seed-list name scope unresolved. An exact source taxon is governed by “Restricted weed seed in lawn and turf seed and mixtures” or an applicable source note, so the qualified row is held instead of publishing an unconditional result. Held source row: usda-ams-state-noxious-weed-seed-2026:NJ:037. Governing seed section: Restricted weed seed in lawn and turf seed and mixtures; normalized seed-kind scope: lawn and turf seed; applicable note rows usda-ams-state-noxious-weed-seed-2026:NJ:029, usda-ams-state-noxious-weed-seed-2026:NJ:040, usda-ams-state-noxious-weed-seed-2026:NJ:041, usda-ams-state-noxious-weed-seed-2026:NJ:042, usda-ams-state-noxious-weed-seed-2026:NJ:047.Official USDA seed requirements.Normalized source record.
PA · Seed-list name scope unresolved. An exact source taxon is governed by “Restricted (Undesirable Grass Seeds) in lawn and turf seeds” or an applicable source note, so the qualified row is held instead of publishing an unconditional result. Held source row: usda-ams-state-noxious-weed-seed-2026:PA:049. Governing seed section: Restricted (Undesirable Grass Seeds) in lawn and turf seeds; normalized seed-kind scope: lawn and turf seed; applicable note rows usda-ams-state-noxious-weed-seed-2026:PA:053, usda-ams-state-noxious-weed-seed-2026:PA:054, usda-ams-state-noxious-weed-seed-2026:PA:055.Official USDA seed requirements.Normalized source record.
VA · Seed-list name scope unresolved. An exact source taxon is governed by “Restricted - Lawn and turf seed only” or an applicable source note, so the qualified row is held instead of publishing an unconditional result. Held source row: usda-ams-state-noxious-weed-seed-2026:VA:036. Governing seed section: Restricted - Lawn and turf seed only; normalized seed-kind scope: lawn and turf seed; applicable note rows usda-ams-state-noxious-weed-seed-2026:VA:014, usda-ams-state-noxious-weed-seed-2026:VA:040, usda-ams-state-noxious-weed-seed-2026:VA:041.Official USDA seed requirements.Normalized source record.
WV · Seed-list name scope unresolved. An exact source taxon is governed by “Restricted Noxious-weed Seed in Lawn and Turf Seed and Mixture” or an applicable source note, so the qualified row is held instead of publishing an unconditional result. Held source row: usda-ams-state-noxious-weed-seed-2026:WV:069. Governing seed section: Restricted Noxious-weed Seed in Lawn and Turf Seed and Mixture; normalized seed-kind scope: lawn and turf seed; applicable note rows usda-ams-state-noxious-weed-seed-2026:WV:079, usda-ams-state-noxious-weed-seed-2026:WV:080, usda-ams-state-noxious-weed-seed-2026:WV:081.Official USDA seed requirements.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.
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.
Source location: PlantCharacteristics record 21475, Temperature, Minimum (°F).
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 60' from home [Idaho minimum planting distance] (mid-scale rating)
FireSmart BC Plant Program: suitable for HIZ extended zone (30-100 m) [FireSmart BC Home Ignition 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.
4 cited rows from this source; its identity, lineage and tier are stated once.
Primary study Cui2020a: Cui, X., Paterson, A. M., Wyse, S. V., Alam, M. A., Maurin, K. J. L., Pieper, R., ... Curran, T. J. (2020a). Shoot flammability of vascular plants is phylogenetically conserved and related to habitat fire-proneness and growth form. Nature Plants, 6, 355-359.
Shared row context: plant part whole plant; fuel all; predrying yes; device grill; site Cui2020a-1; sampling ND.
