Calla Lilies are best planted in the Spring after all danger of frost has passed. They prefer well-drained soil that is rich in organic matter. Calla Lilies can be planted in either full sun or partial shade.
For most parts of the country, the best time to plant Calla Lilies is in the early spring. It is best to wait until the danger of frost has passed and the soil has warmed up to at least 65ºF.