Question: are cosmos poisonous to dogs?
Answer: Well, many common plants are very toxic to either dogs or cats, and sometimes to both: ... A sampling of these non-toxic plants includes: Astilbe, Bachelor buttons, Canna Lily, Catmint, Cosmos, Coneflower, Coleus, Coral Bells, Impatiens, Jacob's Ladder, Magnolia, Muscari, Russian Olive and Phlox.