Tree lilies, also known as Trumpet lilies (Lilium ‘Tree-type’) or tower lilies, are hybrid lilies that are characterized by their tall and sturdy stems, large trumpet-shaped flowers, and strong fragrance. These lilies are bred to be even taller and more robust than the Oriental and Asiatic lilies.

In the UK, tree lilies can grow to impressive heights, typically ranging from 5 to 8 feet (150 to 240 cm) tall. Some exceptional varieties might even reach heights of up to 10 feet (300 cm) under the right growing conditions.

As with any plant, the size of tree lilies can be influenced by factors such as soil quality, sunlight exposure, water availability, and overall care. These lilies are often planted in the spring and can produce stunning blooms during the summer months, adding a touch of elegance to the garden with their height and vibrant flowers.