Stunner of a canna you got there ..love the pics of the reservoir too...great to have somewhere like that close at hand to get out and unwind. Reminds me of a local forest park near here , tourists come from all over in the spring too as it has one of the largest bluebell displays in the uk every springtime,,i'll hunt out a few shots to pop up later.
Love the Canna, I just wish some-one would produce a Hardy variety. I had two last year, but had no-where to over winter them.
If you lift the corms in autumn and place them somewhere cool and dark for a while until the plant dies back, simply pop them in a pot of dry peat and place them in a cool cupboard or shed that is protected from frost and then re plant them each spring. Really give give a tropical hot blast to any garden or container display.