I leave the Black eyed susans for the little winter critters and yes -- they reseed and go crazy here.
I also leave the Clemantis - cut the sticks off in the Spring!!
I do cut my Iris's back to about 6 inches.
I usually cut Dayliliys back in the fall if they have been in the ground for over a year... else if they are new this year I leave them.
Asiatic/Oriental - cut back like Iris.. or pull them right out like Chris.
Hosta's leave them and deal with the mess in the spring time!!
