In their ideal environment, calla lilies need very little care and grow like weeds. In average conditions, caring for calla lilies requires simple gardening procedures and common sense. Only in rare, extreme circumstances do calla lilies require specialized care and handling. So plant those bulbs, water regularly and sit back to enjoy bushels of graceful, long-stemmed calla lilies in many colors.
Though "calla lily" is a misnomer since the flowering plant is neither of the calla family nor a lily, and its name is constantly misspelled in multiple ways, and all parts of the pant are poisonous, the calla lily is a popular bloom, especially at Easter and for weddings. Based on this commercial viability, calla lily bulbs and growing guides are easy to find. Once in the ground, planted shallowly with the top of the tuber peeking forth, water generously. Keep the area clear and watch the calla lilies bloom continuously, except in areas with dry spells or frost where it will go dormant.
Feel free to cut calla lily flowers just as they are about to bloom, and they will unfold in a container of clean water. The calla lily plant can produce 10-30 flowers a year, so cutting back contributes to the continuous cycle. Make the cut close to the ground to reserve as many of the calla lily's resources for emergent flowers and be sure to use sharp, clean gardening shears. Use bypass (not anvil) shears that are wiped with alcohol or soap and water after each use.
If and when the calla lily goes dormant, clean up the fallen and decaying foliage on the site and keep the area clear for the new growth to have a free path for re-emergence. After the last frost or when the dry season abates, water the calla lily site generously to encourage its growth.