Beautiful blooms of calla lily (Zantedeschia) are a cut flower favorite that thrives in a boggy environment. Many gardeners tuck calla lily into a spot beside a pond or stream. Plants can grow in up to 1 foot of water. In cold regions, dig bulbs and store dry indoors through winter. Look for varieties that open flowers in many hues, including vibrant yellow, deep red, white and pastel shades. Plants grow 2 to 3 feet tall by 2 feet wide. Hardy in Zones 9-10.