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United States / Grow / switchgrass

switchgrass (Panicum virgatum)
Photo: no rights reserved (CC0), via iNaturalist. Species-typical, not necessarily this cultivar.

switchgrass

Panicum virgatum · Poaceae · all Panicum records · 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.

No, switchgrass is not fire resistant; extension sources consistently classify it as highly flammable or fire-prone.

Five assessments from North Carolina, Ohio, and Arizona all put Panicum virgatum on the side to avoid near structures.

North Carolina’s extension guidance gave switchgrass an extreme flammability rating in 2005. Its 2025 revision calls the grass highly flammable, while the live Plant Toolbox also tags it high. This change does not amount to a safer finding: the newer three-band system dropped the former extreme class, so switchgrass moved into the highest remaining band. Ohio State’s extension service rates it H on a five-point scale, a rating that its guidance treats as one to avoid. That assessment describes switchgrass in full sun to light shade, tolerating moist soil and forming clumps.

Arizona’s Yavapai County extension service reaches the same practical conclusion by naming switchgrass among fire-prone plants. Its bulletin warns that plants in this group may ignite readily and burn intensely. Switchgrass is a grass in the Poaceae family, grows to about four feet at maturity, and has high water needs. Those traits do not override the repeated ratings from different regional extension programs. For landscaping close to a home or other structure, the published guidance points clearly toward choosing something else.

Fire-resistant grasss instead

Form
grass
Mature height
~4 ft
Water need
high
Rated in
NC; North Carolina; North Carolina / southeastern US; Ohio / Midwest +1
On this lot

1. Fire evidence and conditions

Fire evidence
Highly flammable — location does not change the cited classification.
Placement evidence
2 source placement records; source schemes remain separate.
Evidence regions
NC; North Carolina; North Carolina / southeastern US; Ohio / Midwest; Yavapai County, Arizona
Typed publication scope: 3 scopes across 3 cited fire sources
  • Fire-Resistant Landscaping in North Carolina (AG-874) · Official scoped edition
    • NC; complete normalized coverage · 2025-03-26

      The complete three-table AG-874 plant list is explicitly for North Carolina and contains 202 low-, medium-, or high-flammability rows. FireApproved accounts for all source rows under its strict taxonomy and lineage rules; source scope does not establish local suitability at a particular North Carolina site.

  • Firewise Landscaping (OSU Extension Bulletin 921) · Official scoped edition
    • OH; partial normalized coverage · 2006-03-01

      Ohio State University Extension Bulletin 921 is an Ohio publication that describes Ohio fire seasons and landscape conditions and labels nativity to Ohio. FireApproved publishes 352 exact source-owning plant records from its eight rated tables. This historical publication scope does not assert current extension endorsement or that a listed plant suits every Ohio site.

  • Fire-Resistant and Fire-Prone Plants Common to Yavapai County (Bulletin 34) · Official scoped edition
    • Yavapai County (AZ footprint); partial normalized coverage · 2025-03-14

      University of Arizona Cooperative Extension authors Bulletin 34 for Yavapai County. FireApproved publishes 198 exact source owners from its resistant and prone tables and keeps the county boundary visible. County publication scope is regional Arizona context, never statewide scope.

2. Why this plant is relevant here

State distribution
Documented in AL, AR, AZ, 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, PA, RI, SC, SD, TN, TX, UT, VA, VT, WI, WV, WY.
Native range
Current cited native range in AL, AR, AZ, CO, CT, DC, DE, FL, GA, IA, IL, IN, KS, KY, LA, MA, MD, MI, MN, MO, MS, MT, NC, ND, NE, NH, NJ, NM, NV, NY, OH, OK, PA, RI, SC, SD, TN, TX, UT, VA, VT, WI, WV, WY.
Introduced / established
4 sourced range or established records. This is not an invasive warning.
USDA hardiness
Documented minimum 6a; no upper limit is documented.

3. Legal, ecological, and broader status

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

44

exact source areas

Current introduced

4

exact source areas

Qualified

0

doubtful or extinct source rows

44 native source areas · World Checklist of Vascular Plants, version 16 v16, as of 2026-06-04
  • Alabama (AL)
  • Arkansas (AR)
  • Arizona (AZ)
  • Colorado (CO)
  • Connecticut (CT)
  • District of Columbia (DC)
  • Delaware (DE)
  • Florida (FL)
  • Georgia (GA)
  • Iowa (IA)
  • Illinois (IL)
  • Indiana (IN)
  • Kansas (KS)
  • Kentucky (KY)
  • Louisiana (LA)
  • Massachusetts (MA)
  • Maryland (MD)
  • Michigan (MI)
  • Minnesota (MN)
  • Missouri (MO)
  • Mississippi (MS)
  • Montana (MT)
  • North Carolina (NC)
  • North Dakota (ND)
  • Nebraska (NE)
  • New Hampshire (NH)
  • New Jersey (NJ)
  • New Mexico (NM)
  • Nevada (NV)
  • New York (NY)
  • Ohio (OH)
  • Oklahoma (OK)
  • Pennsylvania (PA)
  • Rhode I. (RI)
  • South Carolina (SC)
  • South Dakota (SD)
  • Tennessee (TN)
  • Texas (TX)
  • Utah (UT)
  • Virginia (VA)
  • Vermont (VT)
  • Wisconsin (WI)
  • West Virginia (WV)
  • Wyoming (WY)
4 introduced source areas · World Checklist of Vascular Plants, version 16 v16, as of 2026-06-04
  • Hawaii (HI)
  • Idaho (ID)
  • Oregon (OR)
  • Washington (WA)

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 (5)

Corroboration (2 rows from 2 sources)

Fire-resistant grasss instead

fox sedge
Carex vulpinoidea tall fescue
Festuca arundinacea tall fescue
Lolium arundinaceum whitegrass
Leersia virginica green bulrush
Scirpus atrovirens prairie cordgrass
Spartina pectinata

Fire-resistant grasss listed above

Same genus in the directory · the Panicum group page

Guides that discuss this plant

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

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

Panicum virgatum (Switchgrass). FireApproved. https://fireapproved.com/plants/panicum-virgatum/. Last verified 2026-08-23.