Lily tree hybrids include Arnold, aureo-marginatum, compactum and integrifolium. A hybrid plant results from the mixing of two different plant varieties. Hybrids contain all the desirable elements from both parents.
Aureo-marginatum is a variegated hybrid with yellow-bordered foliage. Compactum is a dwarf variety well-suited for growing in smaller areas. Arnold tulip tree has a columnar growth with a mature height of 50 to 70 feet, and integrifolium has distinct, non-lobed, box-like foliage.
Lily trees are hardy in USDA zones five to nine and grow best in areas of partial to full sun. Plant in moist, well-drained soil. These trees prefer a slightly acidic, sandy soil with a pH of 5.5 to 6.5. Irrigate regularly in the first year of growth. Fertilize with a slow-release, complete fertilizer in late winter.