Re-Nest has a how-to on creating your own litter box garden. The idea is that the litter box will be filled with potting soil and your bunny’s litter will compost. The compost will be used to feed herbs planted in the soil.
It sounds like a promising idea, but I can see some potential problems for it. Our two bunnies would fill up the litter box well before any of the waste begins to compost. We’d end up scooping out most of the poop and some of the dirt before it starts working. Plus, our hungry little bunnies would eat those herbs down to nothing the first chance they got.
But that’s just our buns. It’s a nice looking project, if not practical for our bunnies.
For instructions, visit Re-Nest.com.