How to care for Penstemon in the winter
I have two x campanulatus Penstemons, 'Firebird' and 'Patio Wine'. I bought them in June, and they've been blooming all summer long, and are still blooming! (I've been deadheading them, of course.)
I was just wondering whether they die back in the winter, or whether they need to be cut back. They're perfectly fine now, but I would just like to know ahead of time. Also, do they need protection?