Cosmos — (c) Arturo Castro Castro, some rights reserved (CC BY), uploaded by Arturo Castro Castro
Photo by (c) Arturo Castro Castro, some rights reserved (CC BY), uploaded by Arturo Castro CastroiNaturalistCC BY
Pet safety reference

Cosmos

Cosmos bipinnatus

Garden cosmos is a daisy-like annual usually treated as a pet-safe flowering option, though any large plant ingestion can still cause mild stomach upset.

CosmosCosmos bipinnatusGarden CosmosMexican Aster
Light
Full sun
Habit
Upright flowering annual
Care
Low

Safety status

If a pet has chewed or swallowed plant material and is showing symptoms, contact a veterinarian or poison resource immediately. This product is for structured reference, not diagnosis.

Catsconcern notes

Common signs

Not known for systemic cat toxicity; chewing flowers or foliage may still cause mild vomiting, drooling, or loose stool from plant material.

Escalation note

Keep plant material from becoming a snack. Contact a veterinarian or poison control if symptoms are persistent, severe, or identity is uncertain.

Dogsconcern notes

Common signs

Not known for systemic dog toxicity; larger amounts of flowers, stems, or leaves can still cause mild stomach upset outside the normal diet.

Escalation note

Discourage grazing and verify no nearby toxic plant was eaten. Call a veterinarian if vomiting, diarrhea, lethargy, or other symptoms persist.

Source evidence

NC State Extension: Cosmos bipinnatus

botanical · 95% reliability

Open source

NC State Extension identifies Garden Cosmos as Cosmos bipinnatus and lists common names including Mexican Aster and Tall Cosmos.

Canine Journal: Dog Ate Cosmos

veterinary · 82% reliability

Open source

Veterinarian-authored dog safety guidance says Cosmos plant material is non-toxic, with mild stomach upset possible after large ingestion.

Vet Explains Pets: Are Cosmos Safe For Cats

veterinary · 72% reliability

Open source

Veterinary safety article describes cosmos as generally non-toxic to cats while still advising monitoring for ordinary plant-material GI upset.

cats safety pagedogs safety page

Same safety verdict

Other plants with the same verdict

Same growing conditions

Plants for the same room