Catnip

Catnip (also known as catmint or catswort) is a plant that grows in the Smurf Forest that has a chemical which attracts cats to the plant, causing them to get intoxicated by it.

Empath: The Luckiest Smurf stories
Catnip has been used by the Smurfs in the EMPATH: The Luckiest Smurf stories to throw Azrael off their trail, and Gargamel has even found Azrael playing around in patches of catnip at times when they are supposed to be hunting for Smurfs.

Catnip has been used as a smoking herb by the Smurfs, but does not produce the same effects on them as does smurfnip.