Elephant Ears Calidora (also known as the Persian Palm) is a spectacular giant alocasia variety with classically shaped dark green tropical leaves and a very upright form. A great focal point in gardens, elephant ear Calidora can reach 4-8 feet in height. It prefers partial to full shade. Elephant Ear varieties are hardy in zones 7-10 as perennials and suitable in zones 4-6 as annuals. They are popular as annuals due to their rapid growth - colocasia makes a dramatic impact to the landscape within just one season. Indoors provide very bright, indirect light. Keep evenly moist, not wet or dry. Trim as needed.