This is cats' #1 floral nemesis. Daylilies, tiger lilies, Easter lilies, and others are toxic to cats and can induce severe kidney failure.
Lily
The plant's petals, leaves, stem, and pollen are all hazardous. Toxins may even be present in the water that lilies have been sitting in.
Cyclamen
Cats that eat bulbs from the Amaryllidaceae family, which includes many spring flowers, may develop heart arrhythmias and breathing issues.
Daffodils, Tulips, and Hyacinth
The likeness to actual palms makes sago palms popular houseplants. They are extremely toxic to cats.
Sago Palm
Despite not being toxic to cats, kalanchoe, a popular houseplant, can cause gastrointestinal discomfort.
Kalanchoe
Chewing the leaves causes oral pain, burning, drooling, and swelling that may make swallowing or breathing difficult for cats.
Dieffenbachia
Avoid confusing autumn crocus with spring Crocus vernus. C. autumnale, which blooms in October, is the most dangerous.
Autumn Crocu
This genus's plants all contain toxins that can harm cats' digestive, circulatory, and nervous systems.
Azalea/Rhododendron
Lilies of the valley are harmful to cats despite not being real lilies. After eating it, cats can develop arrhythmia, low blood pressure, seizures, and coma, which can kill.