The crinum lily (Crinum X powellii) is one of the largest lily plants in Florida and some varieties grow up to 5 feet tall including the bloom spike. They form a dense clump as the bulbs reproduce and can live for many years. They are commonly seen in cemeteries or old homesteads in the South where they receive little or no care. However, for best bloom production supplemental water and rich garden soil is recommended when growing crinum lilies in Florida. They bulbs will need to be dug in the fall and protected from freezing in USDA horticultural Zones 6 and colder.
Find a location in the garden that receives at least 4 to 6 hours of morning sun followed by bright afternoon shade each day and is close to a water source to plant your crinum lily. This is enough light for any variety of crinum lily to thrive whether you have a shade loving variety or one that prefers full sun.
Dig a hole with a shovel that is wide enough to accommodate the crinum lily bulb and deep enough so that the neck of the bulb is slightly above the ground. Look for a soil line on the neck of the plant where the leaves are growing from the bulb that indicates how deep the lily was originally planted and use that line as an indication of how deep to plant the crinum lily bulb.
Add a mixture of one-half compost and one-half native soil around the crinum lily to settle it in place.
Cover an area 12 inches in diameter around where the crinum lily bulb is planted with a 1-inch layer of mulch. Apply enough water to settle the bulb into its new location.