Catnip is in the mint family, but is NOT invasive like peppermint.
It makes a small, hardy shrub that shows up fairly early in the springtime. It is perennial. The pet supply store is full of various toys, cat condos, and scratchers featuring dried catnip. Not all cats like catnip. Our cat does, but he is really interested in the catnip itself rather than the fancy accessories.
If your cat is habitually unimpressed, or pointedly chooses your significant other over you, then this could be your new secret weapon. My cat loves it. I love to bring in a sprig from the garden just to see him act the fool.
Are there any plants that you grow just for fun?