How can i stop my kitten peeing in my plants?!?

she is litter trained and does use her tray, but she will dig in my plant pots in the house and i don't want to have to move them, particularly my large tall plant which sits on the floor! Is there a way to stop her from doing her business in them? I have already tried orange peel, and a spray which is meant to deter cats from digging in plants