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Douglas fir

Pseudotsuga menziesii · Pinaceae · all Pseudotsuga records

Your local evidence lens

Separate evidence questions, never one approval badge

Set a ZIP to compare this record with state distribution, native range, USDA hardiness, and invasive records.

A genus split is not a placement verdict. Set a ZIP to read the local documented split.

1. Fire evidence and conditions

Fire evidence
Highly flammable — location does not change the cited classification.
Fire-performance conditions
1 condition stated in cited fire-evidence rows.
Fire ecology context
No section-reviewed fire-ecology context is normalized.
Placement evidence
4 source placement records; source schemes remain separate.
Evidence regions
Ashland, Oregon; California; Catalonia, Spain; Colorado, California, and northeastern United States; Global; Marin County, California; Michigan / Great Lakes; Yavapai County, Arizona; eastern US
Maintenance
No sourced horticultural maintenance assertion is normalized; fire-test conditions do not supply maintenance advice.
Typed publication scope: 5 scopes across 5 cited fire sources

2. Why this plant is relevant here

State distribution
Documented in AZ, CA, CO, DC, DE, ID, MD, MN, MT, NJ, NM, NV, NY, OH, OR, PA, TX, UT, WA, WV, WY.
Native range
Current cited native range in AK, AZ, CA, CO, ID, MT, NM, NV, OR, TX, UT, WA, WY.
Introduced / established
1 sourced range or established record; set a location to match them. This is not an invasive warning.
USDA hardiness
2 applicable cited hardiness statements overlap but have different boundaries; compare each complete source row.

3. Legal, ecological, and broader status

Legal-list status
Set a location for an exact legal-list result; source silence is not clearance.
Seed-list status
Set a location to compare the separate state noxious-weed seed layer.
Reported invasive here
No ecological invasive report is normalized; that does not prove noninvasiveness.
Broader regional context
Aggregate AK, HI, and L48 evidence is shown only as regional context, never as an exact-state finding.
Federal context
Federal designations remain separate from state legal-list results.
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.

Douglas fir (Pseudotsuga menziesii)
Photo: (c) Norma Piedra, some rights reserved (CC BY) (CC BY), via iNaturalist. Species-typical, not necessarily this cultivar.
Form
tree
USDA hardiness
Applicable source statements overlap but have different boundaries; compare each source
Mature height
~75 ft
Light
Full sun
Water need
moderate
Current cited native range
AK, AZ, CA, CO, ID, MT, NM, NV, OR, TX, UT, WA, WY
Grows in
AZ, CA, CO, DC, DE, ID, MD, MN +13
Rated in
Ashland, Oregon; California; Catalonia, Spain; Colorado, California, and northeastern United States +5
Family
Pinaceae
Evidence
213 cited sources

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

13

exact source areas

Current introduced

1

exact source area

Qualified

0

doubtful or extinct source rows

13 native source areas · World Checklist of Vascular Plants, version 16 v16, as of 2026-06-04
  • Alaska (AK)
  • Arizona (AZ)
  • California (CA)
  • Colorado (CO)
  • Idaho (ID)
  • Montana (MT)
  • New Mexico (NM)
  • Nevada (NV)
  • Oregon (OR)
  • Texas (TX)
  • Utah (UT)
  • Washington (WA)
  • Wyoming (WY)
1 introduced source area · World Checklist of Vascular Plants, version 16 v16, as of 2026-06-04
  • New York (NY)

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.

Conditions in the fire evidence

These describe tested or rated plant material. They are not horticultural maintenance instructions.

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.

Recommends (1)

Avoids (6)

Mid-scale / conditional (1)

Listed without a rating (205)

Fire-resistant trees instead

Boxelder
Acer negundo Thornless honeylocust
Gleditsia triacanthos Smooth sumac
Rhus glabra Quaking aspen
Populus tremuloides Lombardy poplar
Populus nigra 'Italica' Common hackberry
Celtis occidentalis

Fire-resistant trees listed above

Same genus in the directory · the Pseudotsuga group page

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

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

Pseudotsuga menziesii (Douglas fir). FireApproved. https://fireapproved.com/plants/pseudotsuga-menziesii/. Last verified 2026-08-23.