I have an outdoor enclosure that is 8'x8' soon to be double that. When I built this one I dug up all the plants and replanted with tortoise safe plants. However as everyone knows I have plants that I did not plant growing in there. My worse uninvited guest in creeping charlie which I have all through my yard. I know this is not safe for tortoises so I try pulling it up. Unfortunately it grows so fast. My question is what do people do in a large enclosure to prevent unwanted plants?