Hello,
I am new to this site and it has been so nice to meet & chat with people that love gardening and plants. I have the Longwood canna hybrid called Endeavour My zone is 7b and it overwinters in the the ground next to the pond. The area stays on the wet side year round. I usually stick a pot in the pond too. It has bright reddish-pink flowers and the leaves are more rounded than regular cannas. The foliage color is very pretty with a blue tinge.
Here is some information I found on the Longwood Botanical Garden site:
"Native to South America, Canna glauca is a water canna that is noted for its blue-green foliage and its ability to grow well in shallow water. Species plants grow 4-6’ tall and feature narrow, blue-green leaves (to 18” long) and small pale yellow flowers. In the 1970s, Longwood Gardens in Kennett Square, Pennsylvania crossed Canna glauca with several different terrestrial cannas. The result was the Longwood cultivars, which are four hybrid water cannas that typically grow 2-6’ tall with a spread of 2-3’ as follows: (1) ‘Endeavor’ (red flowers), (2) ‘Erubus’ (salmon pink flowers), (3) ‘Ra’ (yellow flowers) and (4) ‘Tanny’ (burnt orange flowers). Longwood cannas typically bloom all summer"
This picture comes from my garden.