Although not considered true lilies, the calla lily is an extraordinary flower. This beautiful plant, available in a multitude of colors, is ideal for use in beds and borders. You can also grow calla lilies in containers, either outdoors or in a sunny window as houseplants. These plants do not generally require too much attention. Proper planting and location are about the only important things to consider when growing calla lilies. Care of calla lilies requires that they be planted in loose, well-drained soil. Choosing to grow calla lilies in the garden or as houseplants is a great way to add color to any area.