I planted two side by side and they are making lots of buds and flowers. The flower gets its name from the buds that are like little balloons. They suddenly pop open and you have colourful star-shaped flowers. They also come in white and pink but I found the pink to be very washed out so now I stick with the purple ones.
The balloon flowers will make a nice clump if the soil is adequately enriched. They can tolerate dry conditions and don't like to be soggy. So far I haven't had any insect pests or diseases on the balloon flowers.