This cultivar is not identifiable without seeing the plant in bloom. It likely belongs to the Musafolia group of cannas. This group typically grows quite tall and produces rather small flowers usually in the red, orange or salmon shades. Several of these differing cultivars bloom in late mid-season in many areas. Your plant appears to be growing very well and I would not be surprised if it produced flowers before frost. You have a beautiful setting and hope you will update your results.

Kent

Well, surprise for me i see each one with a flower. They are orange color, and don't know if that is the final look of the flower or it would eventually really open up. I will show a couple of pictures soon.

The foliage appears similar to my 'Wyoming' which blooms a little late (for me) ... and orange. Your plant is very beautiful.