I tried dirt once upon a time… it’s messy to clean, doesn’t absorb odors, and they will scratch it out and fling it everywhere. I have a dig box with play sand for my bunnies to dig in. It has tall walls, so they can’t fling the sand everywhere. If you give yoru bunny dirt in her litterbox, she will be so overjoyed at her new dig box, that if she does use it as a litterbox, she will fling all that peed on dirt out for you to clean up. I think you shoud lstick to the traditional litterbox. A separate dig box woudl be fun for her thouigh, and easier for you to keep clean. I haven’t used pet grass. I choose my floor based on what they bunny will destroy or not. Avalon and Morgana have plywood over linoleum over carpet. They destroy carpet, dig through to the floorboards, and shred linoleum, so I put plywood down. It’s the only thing they won’t desroy. They shred towels and fleece. Guin is fine with carpet, but Lancelot is incontinent so Guin and Lancelot have a layer of puppy pee pads, then humab bed pads, then puppy pee pads – over carpet. You could try a small piece of pet grass and see what yoru bunny does with it. Does she chew it – pee on it – etc. I woudl always recommend trying a small sample before you go through all the effort of creating the entire bunny habitat, only to find out that yoru bunny is destroying the pet grass. It may be that she is fine with it. It sounds like acute idea. Natural landscapes are what all bunny’s dream of! Along with the comfort of indoor central cooling!
For the plants – they might gobble them up before you can grow new plants. I would put them up on a shelf out of bunny’s reach so they still provide aesthetics, and can live to see the next day. I used to use a pallet as planter to grow sprouts for Guin. She thought I had given her a dig box, and she dug up all my sprouts and scattered the dirt everywhere.
I like low ledges and rocks.
I wouldn’t do dim lights. I’d have daylight (full spectrum) during the day, and completely dark after sunset. I use full spectrum lightbulbs in my bunny room, and they are on a timer. I adjust the timer to match sunrise and sunset. So the lights automatically go on at sunrise, and off at sunset. If I could keep the chord safe, I’d add a blue liught also on a timer, to provide 30 minutes of dawn and dusk as the lights come on and off.
Remember your bunny room/paradise needs to be easy for you to access and clean.