Michelle, I've noticed the same thing with basil plants. I love the smell of cut basil leaves, but one day I was standing near where I had some plants growing in an old laundry tub, and I noticed a smell like cat pee. When I sniffed these plants, that was where the smell was. I thought it might have been the cats, but no, it was the plants.

Obviously a little bit of the smell is nice, but when it gets stronger, it's more like cat pee. And I hate the smell of cat pee. I was thinking of bringing some of my basil plants inside, but now that you've reminded me, I think I won't.

Jenny