Ha, ha, ha. I grow tropical plants and just to give you an example, I have over 300 plumeria, over 100 orchids, and dozens and dozens, and then dozens more of all kinds of other tropicals. I've got 2.5 acres.[/quote]
Aaaaahhhh!
Is it too early in our relationship to say "I hate you!" ? :-}
Gah! to be able to grow all those things. (I'd add a little head smacking emoji, but I don't know how.)
Well, gosh darn, I do enjoy a puzzle. I assume the Native grows just fine along side turtles out in the wild. Did you ever read the book, "The King, the Mouse, and the Cheese"? Maybe you need a river otter to chase the turtles away from the lilies. No idea what you'd get to chase the river otter away. Gator? Yikes!
My only other thought would be river rock all around, though a 2' turtle probably would be able to work around those as well.
Around here, waterlilies prefer shallow waters during the summer, because they need all the heat they can get. I doubt mine have 10" inches of water above their roots. We don't drop them into deep water until the cold comes along and they show signs of hibernating.
You can call me anything polite, except "late for dinner."