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Asparagus Fern vs. Boston Fern: which is safe for cats and dogs?

Asparagus Fern and Boston Fern are frequently confused by shoppers because both belong to the same fern ambiguity group, leading many to believe they share the same safety profile for household pets. It is important to distinguish between them, as their impact on animals differs significantly. While the Boston Fern is widely considered safe for both cats and dogs, the Asparagus Fern is potentially toxic to pets if ingested or handled. Understanding these differences is essential for maintaining a pet-friendly home, as the two plants require very different levels of caution. We have outlined the specific risks and safety considerations for each plant below to help you make an informed decision.

Asparagus Fern

Asparagus densiflorus

The Asparagus Fern is a popular, feathery houseplant that is actually a member of the lily family. Despite its delicate appearance, it contains toxic compounds that can cause irritation if ingested by pets.

cat

Potentially toxic

Consulted references classify the plant as toxic or irritating for that pet type.

Watch for

Vomiting, diarrhea, and abdominal pain.

dog

Potentially toxic

Consulted references classify the plant as toxic or irritating for that pet type.

Watch for

Vomiting, diarrhea, and abdominal pain.

Full Asparagus Fern reference →

Boston Fern

Nephrolepis exaltata bostoniensis

The Boston Fern is a popular, lush houseplant known for its arching fronds and preference for high humidity. It is widely considered safe for pets, though ingestion of any plant material can occasionally cause minor digestive upset.

cat

Uncertain

Identity or evidence quality is not strong enough for a firm answer.

Watch for

None typically reported; however, ingestion of large amounts of fibrous plant matter may cause mild vomiting or diarrhea.

dog

Generally safe

Consulted references do not classify the plant as toxic for that pet type, while still allowing for mild GI upset if large amounts are chewed.

Watch for

None typically reported; minor gastrointestinal irritation may occur if large quantities are ingested.

Full Boston Fern reference →