To please our three spoiled cats, we grow catnip in a barrel on our patio.
An unexpected benefit is that when the catnip blooms and sets seeds, American goldfinches arrive to partake, bobbing among the blossoms. For us, it’s a two-fer.
Most important is that we get to enjoy watching the beautiful little goldfinches as they eat their fill. But I rejoice also in fewer seeds that will sprout in places where the invasive catnip is not desirable.