Keeping live plants with aquatic turtles is a hopless battle. If they dont eat it they will uproot it. I would stick with silk plants. You can go to a hobby store and get silk plants by the bundle. They are much cheaper than buying them from a petstore and you get much more for your money.
Chris
-----
0.1 Red Eared Slider, 1.0 Common Snapper, 1.0 Bearded Dragon and a 55gal Native Fish Tank with a 6in LM Bass, 3 Crawdads and a Pleco.
I use to have a collection of Leopard Geckos that I bred, but have sold them.