I fell in love with this shrub the first time I saw it.  The flowers are so unique.  This is typically a wetland plant but will tolerate average (not dry) garden conditions if it is kept well-watered until it is established.  It can tolerate standing water and is a good candidate for a rain garden.  
The leaves of this plant are poisonous to mammals, so if you have pets that chew on plants it may not be right for you.