The calla lily is a a spring-growing bulb, or rhizome. These flowers make easy-to-care for houseplants, but they also can thrive in the garden under the right conditions. Transplanting a calla lily requires proper site selection. Upon planting, the lily is low maintenance and can remain in the ground year-round.
Wait until the last frost of spring has passed and temperatures stay above 55 degrees before transplanting calla lilies into the garden. Select a planting site that receives full sun, or partial shade if you live in warmer, southern climates.
Lay down a 2-inch layer of organic compost over the planting site, if your soil is not nutrient rich. Work the compost into the soil with a hand spade or garden tiller.
Dig a hole in the amended soil that is as deep as the calla lily’s container and twice as wide. Remove the calla from the container and use your hands to loosen any pot-bound roots. Do not tear the roots.
Lower the plant into the hole and fill in with the soil. Water until the soil settles. If you are planting more than one lily in the garden, space them 1 foot apart.
Apply a bulb fertilizer once a month, according to the package directions.