True lilies like Easter and Tiger Lilies can cause kidney failure in dogs.
Lilies
The entire azalea plant is toxic. Ingestion can be fatal without treatment.
Azaleas
The bulb contains toxins that irritate the mouth and digestive tract in dogs.
Tulips
Toxins similar to azaleas that damage intestines, liver and heart.
Rhododendrons
Just eating 1-2 leaves can kill dogs. Causes vomiting, diarrhea, seizures.
Sago Palms
Extremely toxic in all parts to dogs’ digestive tract and heart function.
Oleander
Certain varieties contain toxins that cause vomiting, diarrhea, and skin irritation.
Chrysanthemums