German greenweed Toxic?

Updated 2026-03-06| 5 min read| 3,702 found this helpful
Genista germanica L.
1

All parts of German greenweed are confirmed to be toxic for exposed organisms

2

Its toxicity level ranges from mild to severe depending on the amount of plant material ingested

3

It shares the same class of toxic alkaloids as the closely related common broom (Cytisus scoparius)

FAQ

Is German greenweed toxic to Humans?

Limited specific data available; expected symptoms based on related species include gastrointestinal upset, dizziness, and potential cardiac arrhythmia in high-dose exposures (High)

Is German greenweed toxic to Cats?

No formal symptom data documented; potential signs include vomiting, lethargy, and reduced appetite following ingestion (Unknown)

Is German greenweed toxic to Dogs?

No formal symptom data documented; potential signs include vomiting, diarrhea, abdominal pain, and lethargy following ingestion (Unknown)

Is German greenweed toxic to Horses?

No formal symptom data documented; potential signs include salivation, diarrhea, reduced coordination, and cardiac changes following ingestion (Unknown)

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Toxicity Details

Humans
High

Limited specific data available; expected symptoms based on related species include gastrointestinal upset, dizziness, and potential cardiac arrhythmia in high-dose exposures

Cats
Unknown

No formal symptom data documented; potential signs include vomiting, lethargy, and reduced appetite following ingestion

Dogs
Unknown

No formal symptom data documented; potential signs include vomiting, diarrhea, abdominal pain, and lethargy following ingestion

Horses
Unknown

No formal symptom data documented; potential signs include salivation, diarrhea, reduced coordination, and cardiac changes following ingestion

Toxicity Snapshot

Toxic PartsAll parts of the plant
Exposure RoutePrimary exposure route is ingestion; skin contact may cause mild, transient irritation in sensitive individuals
Toxic CompoundsQuinolizidine alkaloids (including sparteine, as confirmed in closely related Cytisus scoparius per cited literature)

First Aid & Prevention

First 30 Minutes

  • • Remove any remaining plant material from the mouth, skin, or surrounding area of the exposed individual immediately
  • • Rinse the mouth of the conscious exposed person/animal thoroughly with clean, cool water
  • • Do not induce vomiting or administer home remedies without explicit instruction from a medical or veterinary professional

Contact Vet Immediately

  • • If your pet or horse has ingested any quantity of German greenweed
  • • If abnormal symptoms (including vomiting, lethargy, or irregular breathing/heart rate) appear after exposure
  • • If you are unsure of the amount of plant material ingested by an animal

Prevention

  • • Keep this plant out of reach of children, pets, and grazing livestock including horses
  • • Learn to identify this species to avoid accidental ingestion during foraging, hiking, or gardening activities
  • • Remove German greenweed plants from yards, pastures, and other areas accessible to pets and livestock

Treatment & Prognosis

  • • Supportive care including fluid therapy and targeted symptom management as prescribed by a qualified medical or veterinary provider
  • • Decontamination measures such as activated charcoal administration if performed within 2 hours of ingestion
  • • Cardiac monitoring for severe exposure cases to identify and address potential arrhythmias
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Professional Toxicology

Scientific NameGenista germanica L.
AliasesDeutscher Ginster、Genêt d'Allemagne、Ginestra spinosa
Toxicity Grade
HumansHigh
CatsUnknown
DogsUnknown
HorsesUnknown
Target Organs
Gastrointestinal tractCardiovascular systemCentral nervous system
Mechanism of Action

• Toxic quinolizidine alkaloids interfere with nervous system signaling and cardiac muscle function, as documented in closely related toxic Fabaceae species

Other Species Risk (CliniTox)

Information from CliniTox veterinary text.

Cattle, sheep, and goats: Toxicity is expected based on related Fabaceae species data; ingestion may cause gastrointestinal distress, cardiac abnormalities, and potential fatality in high doses
Small companion mammals (rabbits, guinea pigs, hamsters): Toxicity not formally studied; ingestion is discouraged due to confirmed toxic alkaloid content in the plant
Confusion Risk

The following plants look similar and may be confused:

Other Genista species Genista spp.
Closely related Genista species share nearly identical shrubby growth habit, yellow flower morphology, and habitat, making visual differentiation difficult for non-botanists
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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.

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