I think the think leaves will just give them something else to scratch at. You can try sticking some plastic or metal 'sticks' around the pot to keep them from being able to get up in the pot if they're actually getting in it to scratch, otherwise I would say you'd have to put them behind a fence or something. my birds tear up any plant they can get their hands on and will dig in any big pot they can find so I keep mine all behind a welded wire fence