Large-flower pelargonium Toxic?

Updated 2026-03-06| 3 min read| 1,118 found this helpful

Toxins have been verified in all Large-flower pelargonium tissues, though no confirmed poisoning cases are published

The plant is explicitly unsuitable for use as feed for any livestock, pet, or domestic animal species

This species is easily confused with other closely related Pelargonium varieties with similar toxicity profiles

FAQ

Is Large-flower pelargonium toxic to Humans?

No confirmed symptomatic poisoning cases reported; mild gastrointestinal irritation is possible if large volumes are ingested (Low)

Is Large-flower pelargonium toxic to Cats?

No confirmed feline poisoning cases reported; mild vomiting or diarrhea may occur with large ingestions (Low)

Is Large-flower pelargonium toxic to Dogs?

No confirmed canine poisoning cases reported; mild gastrointestinal upset may occur with large ingestions (Low)

Is Large-flower pelargonium toxic to Horses?

No confirmed equine poisoning cases reported; mild digestive irritation is possible with large voluntary intake (Low)

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Toxicity Details

Humans

Low

No confirmed symptomatic poisoning cases reported; mild gastrointestinal irritation is possible if large volumes are ingested

Cats

Low

No confirmed feline poisoning cases reported; mild vomiting or diarrhea may occur with large ingestions

Dogs

Low

No confirmed canine poisoning cases reported; mild gastrointestinal upset may occur with large ingestions

Horses

Low

No confirmed equine poisoning cases reported; mild digestive irritation is possible with large voluntary intake

Toxicity Snapshot

Toxic PartsAll plant parts contain detectable toxins; no toxic dose has been formally established for any species to date

Exposure RoutePrimary exposure route is ingestion; mild, unconfirmed skin irritation may occur with prolonged contact with damaged plant sap

Toxic CompoundsUnidentified irritant and alkaloid compounds; full toxic constituent characterization is not available for this species

First Aid & Prevention

First 30 Minutes

• Rinse mouth thoroughly with clean water immediately if any part of the plant is ingested
• Remove all remaining plant material from the mouth, skin, and surrounding area to prevent further exposure
• Monitor the exposed individual (human or animal) for unusual symptoms for 24 hours post-exposure

Contact Vet Immediately

• If your pet or livestock ingests more than 1-2 small leaves/flowers of the plant
• If any unusual symptoms (vomiting, diarrhea, lethargy, skin redness) appear after exposure
• If you cannot confirm the amount of plant material ingested by your animal

Prevention

• Keep plants out of reach of children, pets, and grazing livestock
• Never use any part of the plant as animal feed, for human consumption, or for herbal preparations
• Confirm plant identity before planting in areas accessible to pets or free-grazing animals

Treatment & Prognosis

• Supportive care including fluid therapy and gastrointestinal protectants if symptomatic after ingestion
• Symptomatic care for skin or mucous membrane irritation if contact reactions occur
• No specific antidote exists, as no severe poisoning events have ever been documented

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Professional Toxicology

Scientific NamePelargonium grandiflorum (Andrews) Willd.

AliasesGeranium grandiflorum Andrews、Royal pelargonium、Florist's pelargonium、Edelpelargonie (German)、Pélargonium à grandes fleurs (French)、Geranio imperiale (Italian)

Toxicity Grade

HumansLow

CatsLow

DogsLow

HorsesLow

Target Organs

Gastrointestinal tractSkinMucous membranes

Mechanism of Action

• Specific toxic mechanism is not well characterized due to lack of recorded severe poisoning events

• Detected plant compounds are suspected to cause mild local irritation to gastrointestinal and skin tissues

Other Species Risk (CliniTox)

Information from CliniTox veterinary text.

Small mammals (rabbits, guinea pigs, hamsters): No confirmed poisoning cases recorded, but ingestion may cause mild gastrointestinal upset; access to the plant should be prevented

Ruminant livestock (cattle, sheep, goats): No confirmed poisoning cases reported, but the plant is not recommended as a feed source due to confirmed toxin presence

Confusion Risk

The following plants look similar and may be confused:

Other Pelargonium varieties Pelargonium spp.

Most Pelargonium species have very similar leaf morphology and growth habits; this species is distinguished by its significantly larger flower size compared to common garden Pelargonium varieties

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Related Toxic Plants

Zonal geranium

Pelargonium zonale

Low toxicity

Herb Robert

Geranium robertianum

Low toxicity

Common stork's-bill

Erodium cicutarium

Low toxicity

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Data Sources

1. CliniTox (Universität Zürich)

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