Partial shade or sun. Nearly evergreen. There are many cultivars. Nepeta cataria is the classic catnip; Faasen’s catmint (Nepeta x fasseenii) is a Dutch hybrid that has bloomed all summer long, even in the Texas plains — making it a favorite for not only cats but butterflies as well.
Chemical attractants in the stems and leaves keep cats excited and (hopefully) too distracted to use the landscape as a potty.