Planting in my terrarium ?

[QuimperTortoises]

Hey just wondering if any of you guys recommend certain plants to put in with my three toed. I'd really like to make her a nice bioactive terrarium and i've got everything planned out except for the plants. Are bigger plants better or should I just keep it smaller so she has more place to move around, or are "creeping" plants better ? If any of you have advice it would be greatly appreciated.