Catnip grows really well in my garden. Back when I had elderly cats that were allowed to go out into the backyard, they loved both the grass and catnip. Sure enough, one of them would always make a b-line for the grass, chew it, and urp, then with that business over she'd enjoy the sun (and catnip).
I've tried many times to grow the cat grass and catnip indoors over the years, and have always failed... until now
I've actually got one of those little pots of catnip growing on my window sill, which I've had there for a couple of months. It has nice southern exposure, and I need to water it about every other day. But if I do that, it does fine. In fact it's probably doubled in size since I got it