Question: are any ferns toxic to cats?
Answer: With ferns, according to the aspca database, you need only avoid: The very toxic Cycads (not really a fern, but also known as “Fern Palm” and Sago Palm) and the mildly toxic Asparagus Fern (aka Asparagus, Emerald Feather, Emerald Fern, Sprengeri Fern, Plumosa Fern, Lace Fern, Racemose Asparagus, Shatavari, Asparagus ...