You are buying one Giant/Grand White Spider Lily Plant (Crinum asiaticum).
This plant ranges from 18-24 tall and is about two years old. These will take another 2-4 years to reach blooming size, depending on climate and care. See photo for an example of the size of the bulbs.
This crinum is native to tropical areas of Asia. It is now a favorite landscape plant in Florida, the gulf coast, California and other warm climate areas. Can grow to 4' high and 5' wide. Use the Grand Crinum to create a tropical mood near the pool or patio. Use like a sculpture to create a focal point in the garden or in an expanse of lawn.
This big lily looks great with palm trees and ornamental grasses and makes a striking display when planted in a large cluster. Their drought resistance make them useful in xeriscapes. Also does well in containers.
This impressive plant is easy to grow and requires little care. In many mild winter areas this is a common pass-along plant - neighbors sharing excess bulbs with one another. In addition to its beautiful form, the grand crinum is an enthusiastic non-stop producer of huge fragrant flowers (unless cut down by frost and freezing weather)
Hardiness: USDA Zone 9 - 11. You can grow this crinum in Zone 8, but foiliage is killed by freezing winter temperatures. Grow in containers in colder zones.
Culture: This lily is happy in just about any type of well drained soil. Light: Prefers bright sunny situations but will grow in medium shade - especially in the hottest zones.