Zantedeschia, Mixed Calla Lilies are easy to grow and add a classy look to perennial gardens, cutting gardens and container plantings. Their smooth, sword-like foliage stays neat and attractive all-season long. Calla lily flowers emerge in mid to late summer and last for weeks. This mix has a variety of colors, which are always impressive in the garden and their unusual cup shape is elegant in a vase. Plant these rhizomes 4 to 6 inches deep in sunny to partial shady spot this spring for gorgeous early summer blooms.