Thank you for both of your replies and the warm welcome!
I am not aiming for any sort of a carpet - definitely not under the illusion that I can get away with it.
I'd like to fill it with plants that rest just an inch or two above the substrate but don't extend beyond 5" or so. The options you guys put out I think fit very well into that, thank you.
I'll await any more suggestions. Thanks for the input!
Last edited by STS_1OO; 12-03-2012 at 06:43 PM.
Reason: missed some words!