Cats
Potentially toxicConsulted references classify the plant as toxic or irritating for that pet type.
Verified against ASPCA/provenance audit 2026-05-06 on May 6, 2026.
Sources
cat safety reference
Is English Holly safe for cats?
Ilex aquifolium
English Holly is an evergreen shrub or tree known for its glossy, spiny leaves and bright red berries. While ornamental, the plant contains compounds that can cause gastrointestinal distress if ingested by pets.
Christmas HollyEnglish HollyEuropean HollyIlex aquifolium
- Light
- Partial shade to full sun
- Habit
- Shrub or small tree
- Care
- Moderate
Safety status
What this means for your cat
Most cats that nibble English holly get a sore mouth from the spiny leaves and a mild round of stomach upset, not anything life-threatening. The leaves and red berries contain saponins (a soap-like irritant) that drive vomiting and diarrhea, and the spines themselves can scratch the mouth and tongue. Watch closely if your cat ate berries — those are the most concentrated source.
What to watch for
Lip-smacking, drooling, and head-shaking from the leaf spines. Vomiting (sometimes with leaf fragments). Diarrhea. Reduced appetite for a day or so. Larger berry ingestion can drive more dramatic vomiting and lethargy.
Time window
Oral discomfort and vomiting typically appear within a few hours of chewing. Most cats recover within 24 hours; exact onset and duration are not well documented in the cited sources.
When to call the vet
Call your vet or ASPCA Poison Control at (888) 426-4435 if you saw your cat eat berries, vomiting won't stop, or your cat is lethargic for more than a few hours.
First aid at home
Don't try home remedies — Pet Poison Helpline specifically warns against giving milk, peanut butter, raw eggs, or table salt before calling. Remove any uneaten leaves or berries from your cat's reach, then call Pet Poison Helpline at (855) 764-7661 or ASPCA Poison Control at (888) 426-4435 before treating at home.
Sources: ASPCA, Pet Poison Helpline.
If a pet has chewed or swallowed plant material and is showing symptoms, contact a veterinarian or poison resource immediately. This product is for structured reference, not diagnosis.
Cats — concern notes
Common signs
Vomiting, diarrhea, and depression.
Escalation note
Ingestion of the berries or leaves can lead to significant gastrointestinal upset. Please contact your veterinarian or a pet poison control center if you suspect your cat has ingested any part of this plant.
Safer alternatives
No hand-picked alternatives for this plant yet. You can still pick your own using the Compare button on any other plant.
Source evidence
ASPCA Toxic Plant List
toxicology · 99% reliability
Holly (Ilex aquifolium) is listed as toxic to both cats and dogs, causing vomiting, diarrhea, and depression.
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