Ash (Common European Ash) Toxic?

Updated 2026-03-06| 2 min read| 4,577 found this helpful
Ash (Common European Ash)
1

Bark, leaves, and fruits of ash are all toxic, containing coumarin glycosides activated to more harmful forms by fungal metabolism

2

Ingestion can cause severe symptoms including abdominal pain, subcutaneous swelling, collapse, and genital tissue discoloration in affected animals

3

Treatment for ash poisoning relies on prompt decontamination and targeted symptomatic supportive care per standard toxicology protocols

FAQ

Is Ash (Common European Ash) toxic to Humans?

No formal species-specific toxicity data documented, but ingestion may cause gastrointestinal upset, edema, and systemic adverse reactions (Moderate)

Is Ash (Common European Ash) toxic to Cats?

No species-specific data available, ingestion may cause lethargy, gastrointestinal distress, and other negative reactions (Low)

Is Ash (Common European Ash) toxic to Dogs?

No species-specific data available, ingestion may cause lethargy, gastrointestinal distress, and other negative reactions (Low)

Is Ash (Common European Ash) toxic to Horses?

No species-specific data available, ingestion may cause lethargy, abdominal pain, swelling, and other adverse reactions (Low)

Not sure which plant? Snap a photo to ID in 1 secondGet App

Toxicity Details

Humans
Moderate

No formal species-specific toxicity data documented, but ingestion may cause gastrointestinal upset, edema, and systemic adverse reactions

Cats
Low

No species-specific data available, ingestion may cause lethargy, gastrointestinal distress, and other negative reactions

Dogs
Low

No species-specific data available, ingestion may cause lethargy, gastrointestinal distress, and other negative reactions

Horses
Low

No species-specific data available, ingestion may cause lethargy, abdominal pain, swelling, and other adverse reactions

Toxicity Snapshot

Toxic PartsBark, leaves, and fruits
Exposure RouteIngestion (primary exposure route; no confirmed toxicity from casual skin contact reported)
Toxic CompoundsCoumarin glycosides (fraxin, fraxinol glycoside); Flavone glycoside (quercitrin); Mannitol; Terpene-containing essential oil

First Aid & Prevention

First 30 Minutes

  • • If ingestion occurred <2 hours prior and the affected individual is alert, induce vomiting only if advised by a medical/veterinary professional
  • • Administer activated charcoal to absorb residual toxic compounds as directed by a healthcare provider
  • • Remove all remaining ash plant material from the individual's mouth and surrounding area to stop further exposure

Contact Vet Immediately

  • • Any amount of ash bark, leaves, or fruits has been ingested by a human, pet, or livestock animal
  • • Symptoms like lethargy, disorientation, abdominal pain, swelling, or skin discoloration appear after exposure
  • • The exposed individual is very young, elderly, pregnant, or has pre-existing health conditions

Prevention

  • • Prevent pets, livestock, and children from accessing or ingesting ash tree bark, leaves, or fallen fruits
  • • Learn to correctly identify ash trees to avoid confusion with visually similar edible or low-toxicity species
  • • Regularly clear fallen ash plant debris from pastures, yards, and outdoor play areas to reduce exposure risk

Treatment & Prognosis

  • • Perform decontamination via gastric lavage or activated charcoal administration as appropriate for time since ingestion
  • • Provide symptomatic care including pain management for abdominal discomfort, fluid therapy, and monitoring of edema and organ function
  • • Follow standard emergency plant poisoning care protocols as outlined in clinical toxicology guidelines
Emergency? Open PlantFun for real-time AI guidanceGet App

Professional Toxicology

Scientific NameFraxinus excelsior L.
AliasesCommon Ash、European Ash
Toxicity Grade
HumansModerate
CatsLow
DogsLow
HorsesLow
Target Organs
Gastrointestinal tractVascular systemCentral nervous systemSubcutaneous tissue
Mechanism of Action

• Coumarin glycosides in plant tissue are metabolized into more toxic active coumarin by fungi growing on fallen or harvested plant material

• Toxic compounds increase vascular permeability leading to subcutaneous edema, and trigger adverse effects on the nervous system and gastrointestinal tract

Other Species Risk (CliniTox)

Information from CliniTox veterinary text.

Cattle: Ingestion of toxic ash parts causes apathy, incoordination, collapse, acute abdominal pain, pronounced subcutaneous edema over ribs/flanks/hips/udder/perineum, and purple discoloration of the perineal or vulvar region
Confusion Risk

The following plants look similar and may be confused:

Common Walnut Juglans regia
Visually similar to ash in pinnate leaf structure and mature tree form; key difference is walnut produces large hard-shelled nuts and has a distinct pungent leaf scent, and is slightly toxic
Rowan (Mountain Ash) Sorbus aucuparia
Often misnamed as ash due to similar pinnate leaf shape; key difference is rowan produces clusters of bright red berries in autumn, and is slightly toxic
Use PlantFun to scan and avoid misidentificationGet App

Related Toxic Plants

Download PlantFun App

Identify, grow and care for plants effectively!

Instant Plant ID

Take a photo to quickly identify plants.

Smart Care Reminders

Generate watering and care schedules.

Toxicity & Disease Diagnosis

Identify toxic plants and pests with treatment advice.

Download on the App Store

Data Sources

This information is for reference only and does not constitute medical advice. If ingestion or poisoning is suspected, seek medical or veterinary attention immediately.

View Full Plant Wiki Care Guide Plant ID Uses & Culture
PlantFun

PlantFun

⭐ 4.9 rating · AI toxicity check

Get App