I was in a craft store and found an artificial but nonetheless very realistic house plant in an unattractive clay planter. It was expensive but I bought it, and decided to break it out of it's pot. The result was a cube, 4"x4"x4". I kept it unusually simple for me, with a half inch deep reveal at its base and a similar recess just below its upper edge. The three pieces of the plant were cast in a separate block designed to be inserted into the larger "pot" block. This inner block has dirt glued on the top of it to make it look more realistic.