Canna Selection Advice

Its only really a summer option I think, wouldn't leave them submerged all year.

 

Thanks guys!
I have enough seed grown plants (some from @sal73 ) to try different approaches. Mostly because I struggle to get blooms before the frosts. Having seen some magnificent specimens on a forum as a pond marginal I thought that was worth a go.
The other thing that I'm going try is growing them in pure horse shino and grit. An on-line contact in SoCal grows all his Zingiberales like this.

 

I know it's a bit late about starting seed but I start mine with boiling water
I put them in a cup and pour over fresh boiled water till you hear a popping then pour out the water and put in cold water and get great germination rates