Eucalyptus
Eucalyptus spp.
Yes — eucalyptus is toxic to cats. The ASPCA attributes it to essential oils (chiefly eucalyptol). Dried stems in decor and concentrated oil in diffusers are both hazards, not just the live plant.
Plate IEucalyptus spp. — silver dollar and related species. The aromatic oils (eucalyptol) that scent the foliage are the toxic principle.
Three plants that look the part, without the risk.
Soft, silvery, or fragrant greenery without the oils — all ASPCA non-toxic.
Areca Palm
Feathery, airy foliage for the same fresh look in a bright corner. Safe for cats.
Basil
A fragrant herb that scents a kitchen without any toxin — and is cat-safe.
Calathea
Patterned, calming foliage for a styled shelf. Non-toxic and pet-friendly.
What it does to a cat.
Yes — eucalyptus is toxic to cats. The ASPCA lists it as toxic, with the plant's aromatic essential oils — chiefly eucalyptol — as the culprit. Chewing the foliage causes drooling, vomiting, and loss of appetite; larger ingestions can bring on weakness and depression.
What makes eucalyptus trickier than most houseplants is that it is rarely just a houseplant. Dried stems sit in vases and wreaths for months, bundles hang in showers for their scent, and the oil shows up in diffusers and balms. Every one of those forms keeps the toxin, and the concentrated oil is by far the most dangerous — capable of causing tremors and breathing trouble.
A fragrant, airy look without the oils
If you keep eucalyptus for its fresh silvery foliage, an areca palm gives a similar airy effect and is cat-safe. For scent, basil is a safe aromatic herb, and calathea covers the decorative-foliage role. See also lavender, which shares the same essential-oil hazard.
If oil is involved
Do not let your cat groom eucalyptus oil from its coat. Call your vet or ASPCA Animal Poison Control at (888) 426-4435 — oil exposures can worsen quickly.
What we have actually seen.
Drooling & vomiting
Chewing fresh or dried foliage irritates the mouth and gut. Salivation and vomiting are typical.
Lethargy & weakness
The oils can leave a cat dull, wobbly, and disoriented after a larger ingestion.
Essential-oil toxicity
Concentrated eucalyptus oil is the most dangerous form — diffusers, balms, and spills can cause tremors and breathing trouble.
Decor exposure
Dried eucalyptus in vases, wreaths, and shower bundles is easy to forget and still toxic if chewed.
- ASPCA Animal Poison Control Center. Toxic and Non-Toxic Plants: Eucalyptus.Accessed May 2026 · aspca.org
- Pet Poison Helpline. Essential Oils and Cats.Clinical brief · 2024 ed.