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Citrus

Citrus spp. (accepted: Citrus) · Rutaceae · all Citrus 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: Fire-resistant — 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: 2 source placement records; source schemes remain separate.
Evidence regions: Catalonia, Spain; Global; Marin County, California; eastern US
Maintenance: No sourced horticultural maintenance assertion is normalized; fire-test conditions do not supply maintenance advice.

Typed publication scope: 1 scope across 1 cited fire source

Fire-Resistant Plants Common to Marin County · Official scoped edition
- Marin County (CA footprint); partial normalized coverage · 2019-01-01
  The publication is explicitly limited to plants common to Marin County. FireApproved publishes 104 exact owners as Marin regional context while retaining its placement, spacing, irrigation, and maintenance boundary. It is not statewide California guidance or parcel suitability.

2. Why this plant is relevant here

State distribution: Documented in DC, DE, MD, NJ, OH, PA, WV.
Native range: No current cited or legacy state native range is normalized.
Introduced / established: No introduced or established row is normalized; that does not prove native status.
USDA hardiness: Only uncertain or inapplicable hardiness rows are cited; no primary zone is projected.

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.

Citrus (Citrus spp.) — Photo: (c) coenobita, some rights reserved (CC BY) (CC BY), via iNaturalist. Species-typical, not necessarily this cultivar.

Form: tree
USDA hardiness: Only uncertain or inapplicable source rows; no primary zone projected
Mature height: ~20 ft
Light: Full sun
Grows in: DC, DE, MD, NJ, OH, PA, WV
Rated in: Catalonia, Spain; Global; Marin County, California; eastern US
Family: Rutaceae
Evidence: 6 cited sources

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.

Eastern United States Fire Performance Plant Selector · record citrus-spp · 2016-wayback · as of 2026-08-26

Source prints 8 · single-value meaning unresolved · whole zone precision · source stated

Source taxon: Citrus spp. · 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.

Conditions in the fire evidence

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

irrigated: Fire-Resistant Plants Common to Marin County evidence row

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] (mid-scale rating)
Guía de pirojardinería: suitable inside or outside the 25-metre maximum-risk zone [girona-2020-iuf-25m-suitability] (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.

Mid-scale / conditional (1)

Eastern United States Fire Performance Plant Selector — USDA Forest Service Northeastern Area S&PF + state Firewise programs (WV, OH, PA, DE, DC, MD, NJ) · 2016-wayback · original source Primary evidence Keyed curation lineage: ufifas-srs-tree

“AT RISK Firewise (3)”

The citrus fruit trees-grapefruit, oranges, lemons, limes, tangerines, kumquats. All forms have thorns.

Listed without a rating (3)

FLAMITS: FLAMmability plant traiTS database — Dryad / Global Ecology and Biogeography · Dryad version 9 · original source Corroboration Trait database lineage: meta-aggregator

3 cited rows from this source; its identity, lineage and tier are stated once.
- “maximum flame temperature (°C): 653.25” · score 653.25 (FLAMITS — maximum flame temperature (°C))
  
  FLAMITS record 16390; Combustibility measurement; plant part branches; fuel all; predrying yes; device grill; site Pacheco2022-1; sampling october to november 2022. Primary study Pacheco2022: Pacheco, A. S., Goodman, H. D., Hankenson, L., Fisk, J. J., Ortiz, A., Marinace, H. M., ... Tng, D. Y. P. (2022). Fighting fire with food: Assessing the flammability of crop plant species for building fire resilient agroforestry systems. in review, preprint.
- “burning duration (s): 17.70125” · score 17.70125 (FLAMITS — burning duration (s))
  
  FLAMITS record 16391; Sustainability measurement; plant part branches; fuel all; predrying yes; device grill; site Pacheco2022-1; sampling october to november 2022. Primary study Pacheco2022: Pacheco, A. S., Goodman, H. D., Hankenson, L., Fisk, J. J., Ortiz, A., Marinace, H. M., ... Tng, D. Y. P. (2022). Fighting fire with food: Assessing the flammability of crop plant species for building fire resilient agroforestry systems. in review, preprint.
- “estimated burnt biomass (%): 10.5” · score 10.5 (FLAMITS — estimated burnt biomass (%))
  
  FLAMITS record 16392; Consumability measurement; plant part branches; fuel all; predrying yes; device grill; site Pacheco2022-1; sampling october to november 2022. Primary study Pacheco2022: Pacheco, A. S., Goodman, H. D., Hankenson, L., Fisk, J. J., Ortiz, A., Marinace, H. M., ... Tng, D. Y. P. (2022). Fighting fire with food: Assessing the flammability of crop plant species for building fire resilient agroforestry systems. in review, preprint.

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

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Citrus spp. (Citrus). FireApproved. https://fireapproved.com/plants/citrus-spp/. Last verified 2026-08-23.