The lepechinia is scented...I'm a sucker for scented things. I have not handled the nepeta to see if it's scented, don't know if the cats will be attracted to it, but don't want to release any scent to find out. I can't grow any of the other nepetas because the cats destroy them...LOL...oddly enough, I'd never had problems with centranthus until one of the neighbor cats discovered it...otherwise, I've grown that for years and the cats have ignored it.
I also thought the dark green of the Maple tree made the lavender / purple colored flowers stand out a lot more...
Thank you....