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The Turkish hazelnut tree's favorable Firewise grade includes crown-spacing and upkeep requirements, even with No ladder potential without pruning.
The historical Eastern U.S. Fire Performance Plant Selector gives Corylus colurna Firewise. Its common-name field says European filbert, while the descriptive note calls it True Turkish filbert. The scientific heading identifies the species; another hazelnut's evidence cannot resolve those differing labels.
For a planting grown for nuts, the relevant dimensions concern the mature canopy. The row records a single trunk and a height of 25 feet, alongside its No for ladder potential without pruning. It assigns Landscape Zone 3, 10 to 30 feet from the house. That high-fire-risk framework still requires a minimum of 10 to 15 feet of space between tree crowns. The No flag does not remove that tree-spacing requirement.
Within LZ3, remove yard debris and thin vegetation for 30 feet from the house; on slopes, extend clearing and thinning to 100 feet downhill. Driveways can interrupt fuel. Select shrubs and groundcovers by mature height, minimize massing, and mow brush and weeds annually. Low and moderately flammable plants are acceptable in this zone. Terracing steep slopes may slow spread depending on wind and available fuel.
Full sun, adaptable soil pH and low tolerance of poor drainage describe the recorded site preferences; drought and pest resistance are medium. Nut production is the stated use, not an explanation for the fire grade.
The maintenance work extends beyond the tree's crown spacing. In the selector's program, debris removal covers dead leaves, needles and twigs; branch pruning covers dead, diseased and low growth. Watering and pruning must prevent deadwood accumulation, and plants must retain appropriate separation vertically as well as horizontally. These are historical source conditions, not current legal setbacks.
Form
tree
Mature height
~25 ft
Light
Full sun
Rated in
eastern US
On this lot
1. Fire evidence and conditions
Fire evidence
Fire-resistant — location does not change the cited classification.
Only uncertain or inapplicable hardiness rows are cited; no primary zone is projected.
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.
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 prints 5 · single-value meaning unresolved · whole zone precision · source stated
Source taxon: Corylus colurna · exact match.
Source location: Cold Hardiness Zone field in the recovered selector record.
Not used for comparison: The recovered selector prints one Cold Hardiness Zone value but does not define it as a minimum threshold or a one-zone range.
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.
Eastern United States Fire Performance Plant Selector: Landscape Zone 3 — 10–30 ft from the structure; thin vegetation, remove debris, and minimize plant massing [Fire Performance Plant Selector landscape 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.
