Here is an idea I had today when I planted my nasturtiums. I bought plants and was planning on putting them in that big pot I have on the bottom. I wanted them to cascade down the sides. But then I suddenly got the idea I could make it all taller and have more going on if I put another smaller pot into and on top of the first. This way I have room around the lip in pot one to put some of the plants. The rest went up into the top pot. Now they will trail down the sides as they grow.