I have grown both the White Butterfly and Shampoo gingers plus the Sunset Canna in all kinds of conditions, and all of them in pots, and I am using some 24" diameter pots, average about 2' shorter. Those in full or part sun and in the ground will be 7-8 footers and those in pots, often adjacent to those in the landscape, will be around 5' tall. Just my experience.
Yes, David, as per my previous posts on growing ginger (I only grow the two varieties), I grow them in full sun, part sun, and mostly-shade (sun coming through a canopy of oak leaves). The ones in full or part sun grow larger and bloom earlier.
