How did I miss that one? Please post the photo, Susan! I need to see the grief I missed!
I'll add nepeta 'Walker's Low'. Stunningly beautiful and a gorgeous shade of blue/lavender but gets huge, humongous, enormous and sends out too many seedlings. Probably great where it has lots of room to spread but otherwise it's a constant source of maintenance for me. I have one at each corner of this garden but after cutting it back I'd hate for anyone to see it now (even myself).
