I remember in season 2 or 3 they go walking into a neighborhood and all the lawns are mowed.
But for the prison, they've obviously got a mowing crew. I hope it's not the crew that has to scoop up all the mosquitoes at the fence each day. Would suck.
They should do one "day in the life" show where we get to see all the mundane crap they do. I mean, obviously, you gotta have your standard 5 minutes of zombie slaughter, but that's just a trip to the store.