Is muscari (grape hyacinth) toxic to cats?

No, Muscari armeniacum (grape hyacinth) is classified as non-toxic to cats and dogs per ASPCA data. No toxic principles have been identified in this plant.

Grape Hyacinth Toxic?

Updated 2026-03-06| 2 min read| 2,884 found this helpful

ASPCA classifies Muscari armeniacum as non-toxic, with no identified harmful toxic compounds.

The plant poses no confirmed poisoning risk to cats or dogs from typical ingestion or contact exposure.

Equine toxicity status is unstudied and unknown, so caution is recommended for exposure to horses.

FAQ

Is Grape Hyacinth toxic to Humans?

No confirmed toxicity reports; mild, temporary gastrointestinal upset may occur only with extremely excessive ingestion. (Non-toxic)

Is Grape Hyacinth toxic to Cats?

No known toxic symptoms, as the plant is confirmed non-toxic to cats. (Non-toxic)

Is Grape Hyacinth toxic to Dogs?

No known toxic symptoms, as the plant is confirmed non-toxic to dogs. (Non-toxic)

Is Grape Hyacinth toxic to Horses?

No documented poisoning symptoms; risk of adverse effects is unconfirmed. (Unknown)

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Toxicity Details

Humans

Non-toxic

No confirmed toxicity reports; mild, temporary gastrointestinal upset may occur only with extremely excessive ingestion.

Cats

Non-toxic

No known toxic symptoms, as the plant is confirmed non-toxic to cats.

Dogs

Non-toxic

No known toxic symptoms, as the plant is confirmed non-toxic to dogs.

Horses

Unknown

No documented poisoning symptoms; risk of adverse effects is unconfirmed.

Toxicity Snapshot

Toxic PartsNo plant parts are confirmed toxic to cats or dogs; toxicity of all plant structures to horses is unstudied.

Exposure RouteTypical exposure routes include accidental ingestion of bulbs, foliage, or flowers, and skin contact with plant sap.

Toxic CompoundsNo identified toxic compounds; all known plant constituents are non-harmful to cats and dogs

First Aid & Prevention

First 30 Minutes

• Wipe any remaining plant material from the mouth of exposed humans or pets, and offer small amounts of drinking water.
• Monitor exposed individuals for unusual behavior, though adverse reactions are extremely unlikely for cats and dogs.
• Restrict horse access to additional plant material if large quantities are ingested, and observe for signs of distress.

Contact Vet Immediately

• A cat or dog exhibits persistent vomiting, diarrhea, or lethargy after plant exposure.
• A horse ingests large volumes of the plant and shows signs of gastrointestinal upset or unusual behavior.
• A child ingests very large quantities of the plant and experiences persistent abdominal discomfort.

Prevention

• No special restrictions are needed for households with cats or dogs, as the plant is non-toxic.
• Avoid planting large volumes of the plant in horse pastures until equine safety data is available.
• Keep small bulbs out of reach of toddlers to prevent choking hazards from accidental swallowing.

Treatment & Prognosis

• No specific treatment is required for standard exposure to cats or dogs, as the plant is non-toxic.
• Provide supportive care including fluids for rare cases of mild gastrointestinal upset from excessive ingestion.
• Follow veterinarian-directed supportive care for horses that develop symptoms after large ingestion.

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Professional Toxicology

Scientific NameMuscari armeniacum

AliasesGrape Hyacinth

Toxicity Grade

HumansNon-toxic

CatsNon-toxic

DogsNon-toxic

HorsesUnknown

Target Organs

No organs are confirmed to be damaged by exposure to this plant in cats or dogs

Mechanism of Action

• No identified toxic mechanism for cats or dogs, as no harmful compounds are present in the plant.

• Equine physiological response to plant components has not been formally studied.

Other Species Risk (CliniTox)

Information from CliniTox veterinary text.

Livestock (cattle, sheep, goats): Toxicity is unconfirmed; no documented cases of poisoning have been reported to date.

Small companion mammals (rabbits, guinea pigs): No confirmed toxicity; very large ingestion may cause mild digestive upset due to high fiber content.

Confusion Risk

The following plants look similar and may be confused:

Common Hyacinth Hyacinthus orientalis

Visually similar due to upright spikes of bell-shaped flowers; common hyacinth is toxic to pets, has larger, more fragrant blooms and broader leaves than the small, grapelike flower clusters of grape hyacinth.

Common Bluebell Hyacinthoides non-scripta

Has similar blue bell-shaped flowers; bluebells contain toxic glycosides, and have longer, drooping flower clusters compared to the tightly packed, upright grapelike clusters of Muscari armeniacum.

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Related Toxic Plants

Common Hyacinth

Hyacinthus orientalis

Moderate toxicity to cats, dogs, horses, and humans

Common Bluebell

Hyacinthoides non-scripta

Moderate toxicity to all domestic animals and humans

Siberian Squill

Scilla siberica

Low to moderate toxicity, can cause gastrointestinal upset and cardiac issues in large doses

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Data Sources

1. ASPCA Animal Poison Control

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