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Mayday Tree

Prunus padus · Rosaceae · all Prunus 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: 0 source placement records; source schemes remain separate.
Evidence regions: Arizona above 3,000 feet / interior Southwest; British Columbia; Global; Northeast China
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

FIREWISE Plant Materials for 3,000 ft. and Higher Elevations (AZ1289) · Official scoped edition
- Arizona at or above 3,000 feet (AZ footprint); partial normalized coverage · 2011-12-01
  AZ1289 is explicitly limited to Arizona elevations of 3,000 feet and higher. FireApproved publishes 69 exact owners as regional Arizona context, retaining every water and elevation condition. It is never promoted to statewide low-desert guidance or an independent Tier 1 vote.

2. Why this plant is relevant here

State distribution: Documented in AK, DE, ID, IL, MT, NJ, NY, OH, OR, PA, WA.
Native range: No current cited or legacy state native range is normalized.
Introduced / established: 10 sourced range or established records; set a location to match them. This is not an invasive warning.
USDA hardiness: Documented minimum 3b; no upper limit is documented.

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: 2 ecological invasive reports; set a location to distinguish exact from regional context.
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.

Mayday Tree (Prunus padus) — Photo: no rights reserved (CC0), via iNaturalist. Species-typical, not necessarily this cultivar.

Form: tree
USDA hardiness: Minimum 3b; upper limit not documented
Mature height: ~30 ft
Water need: low
Grows in: AK, DE, ID, IL, MT, NJ, NY, OH +3
Rated in: Arizona above 3,000 feet / interior Southwest; British Columbia; Global; Northeast China
Family: Rosaceae
Evidence: 5 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

0

exact source areas

Current introduced

10

exact source areas

Qualified

0

doubtful or extinct source rows

10 introduced source areas · World Checklist of Vascular Plants, version 16 v16, as of 2026-06-04

Alaska (AK)
Colorado (CO)
Delaware (DE)
Illinois (IL)
Montana (MT)
New Jersey (NJ)
New York (NY)
Pennsylvania (PA)
Utah (UT)
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.

USDA PLANTS Database — Plant Characteristics · record PRPA5 · PLANTS Help Document 2022; characteristics cache retrieved 2026-08-23 · as of 2026-08-26

Minimum 3b · no upper limit documented · half zone precision · derived containing band

Exact source measurement: -33°F; mapped only to its containing half-zone.

Source taxon: Prunus padus · source identifier match.

Source location: PlantCharacteristics record 90619, Temperature, Minimum (°F).

Conditions in the fire evidence

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

cured: Ordering and sorting of fire resistance of tree leaves evidence row

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.

Listed without a rating (2)

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

2 cited rows from this source; its identity, lineage and tier are stated once.
- “temperature at flaming (°C): 277” · score 277 (FLAMITS — temperature at flaming (°C))
  
  FLAMITS record 12578; Ignitability measurement; plant part leaves; fuel live; predrying no; device ignition temperature tester; site Shan2008-1; sampling ND. Primary study Shan2008: Shan, Y., Liu, N., & Shu, L. (2008). Flammability ranking of foliage species by factor analysis of physical and chemical pyric properties. Fire and Materials: An International Journal, 32, 371-382.
- “calorific value (kcal/kg): 4457.93” · score 4457.93 (FLAMITS — calorific value (kcal/kg))
  
  FLAMITS record 12579; Combustibility measurement; plant part leaves; fuel live; predrying no; device calorimeter; site Shan2008-1; sampling ND. Primary study Shan2008: Shan, Y., Liu, N., & Shu, L. (2008). Flammability ranking of foliage species by factor analysis of physical and chemical pyric properties. Fire and Materials: An International Journal, 32, 371-382.

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

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

Prunus padus (Mayday Tree). FireApproved. https://fireapproved.com/plants/prunus-padus/. Last verified 2026-08-23.