Zantedeschia rehmannii Pink Calla Lily Large, elegant, clear pink flowers distinguish this easy to grow perennial which can be used in cutting gardens as well as in container plantings. A dense clump of fleshy sword-like dark green leaves stay neat and attractive all season long. Calla lily flowers emerge in mid to late summer and last for weeks looking impressive in the garden with their unusual cup shape as well as elegant in a vase. Plant these rhizomes 4- to 6-inches deep in a sunny to partially shady spot this spring for gorgeous summer blooms.