Cimicifuga VS Arunca
Would either of these be good behind 2-3' plants? They're supposed to be 5' tall, but the picture of the cimicifuga shows that most of the foilage is quite low and its only the flower stalk that rises high-- so I'm wondering where to position it-- maybe more in middle or front of border?
Have never seen them in real life before, only pictures. How far to space them apart?