I havent tried live plants before. I have only used silk plants, rocks, moss, and plastic driftwood. (easily washible, not dangerous, etc.
My first thought is that you will never see your frogs ever. they will bury themselves down in there good and deep. Tree Frogs like more height in their tanks. So they may be agitated in that tank.
Water is also important. In my old tank, about 1/3 of the "floor" was covered in water. the frogs loved it. I had a waterfall which they loved to sit under, and bubbles, bubbling up from in between the rocks which made a very popular jaquzie. Looking back on it now, It probibly was a bit to much water and a bit to humid, but the frogs sure seemed to like it at the time.
I had moss for a long time, But eventually I found it to be to way to messy and it was the perfect environment for those tiny little flies to have babies in. I eventually switched to cut silk leaves which was soft, and easily cleaned.
Petsmart carries plastic driftwood which looks great and is affordable. My frogs loved climbing all over it. best of all, it wouldnt mold, and wasnt rough on their skin. ( be sure to plug the holes in the log so you don't loose any of your frogs inside.)
Frogs need both humidity and fresh air. I Cover my tank with the ever popular metal screen topper. (I originally used a soft screen velcroed to the top, but my Oldest Tree Frog figured out how to get out of that very quickly.) on top of that I put a large clear plastic bag to help trap the evaporating water, and I leave the back open to allow airflow. I then pump humid air into the tank from a special humidifier made just for amphibians. This insures the tank stays fresh and humid.
My old tank was heated by a small heater in the "pond" this kept things nice and warm all over.
My new tank has an external heating pad which keeps a small cave nice and warm...we will see how that works out.
Let me end by saying that I am no Expert! My Frogs were happy for a year, then they came down with red leg and died. I do not have all the answers, but I am pretty familar with frogs and their personalites, I know what they like, and I know what doesn't work.
My old tank was really pretty, but really hard to keep clean. I should post some pictures soon.
I am trying a differnt approach now, hopefully that works out real well.