Giant size: Tree lilies are the breathtaking result of years of painstaking breeding; these incredible varieties of oriental lily can grow as tall as 2.5m (8ft) in two years. Tree lily: Get a tree lily bulb collection - either nine, 18 or 27 bulbs. Maximum height: Height: 2.5m (8'). Spread: 60cm (24"). Trumpet-like blooms: One single tree lily bulb can produce up to thirty 20cm (8") trumpet blooms and will take on a shrub-like appearance over the years. Collection includes: Tree Lily 'Yellow Rocket', Tree Lily 'Starburst' and Tree Lily 'Pink Explosion'. Tree Lily Bulb Collection | Living Social