Is Scotch Broom Toxic to Cats?
Also known as: Common Broom, English Broom, Cytisus scoparius · Cytisus scoparius
What makes it toxic
Quinolizidine alkaloids, mainly sparteine and cytisine-like compounds, concentrated in seeds and present in leaves and flowers. They act on the heart and nervous system like a mild nicotine overdose.
Warning signs to watch for
Drooling, vomiting, diarrhea and lethargy within hours; larger seed meals can add incoordination, slowed heart rate, low blood pressure and, rarely, collapse.
What to do if your cat eats it
Remove plant material, rinse the mouth and call your vet the same day, especially if seeds were eaten. Slowed heart rate, wobbliness or collapse means an immediate clinic visit.
Common questions
Are Scotch broom seeds the dangerous part?
Yes — the pea-like pods hold the highest alkaloid load, and the pods audibly pop and scatter seeds that pets find. Foliage is milder but still toxic.
Is Scotch broom the same as sweet broom or Genista?
They are related broom genera sharing quinolizidine alkaloids. Treat the whole broom family as toxic to pets.
More plants checked for cats
This page is general educational information, not a substitute for professional veterinary advice. Every pet is different — if your animal ate something concerning, contact your veterinarian or a pet poison hotline right away. Checking what your pet can eat? Visit our sister site SafeOrToxic.