About
Lilium 'Collesium' (VIIa/b) is a named lily cultivar in the family Liliaceae that produces the tall, prominent flowers typical of the genus Lilium. As a bulbous perennial it sends up upright stems that bear its summer blooms from June to August. Plants arise from scaly underground bulbs and may show the stem-rooting habit found in some lilies. The cultivar suits situations where a strong vertical element is required in the summer border.
About the genus
Lilium is a genus of herbaceous flowering plants growing from bulbs, all with large and often prominent flowers. Lilies are a group of flowering plants which are important in culture and literature in much of the world. Most species are native to the Northern Hemisphere and their range is temperate climates and extends into the subtropics.
Wikipedia contributors, "Lilium", CC BY-SA 4.0 — Lilium
In the garden
Lilium 'Collesium' (VIIa/b) is a named cultivar within the genus Lilium (family Liliaceae), a group of bulbous perennials long valued for their large, conspicuous flowers. Members of the genus are native across the temperate Northern Hemisphere, and the plants arise each season from scaly, tunicless underground bulbs. Stems can reach roughly 0.3–1.8 m in height in the genus, carrying the summer flowering display. Grow Lilium 'Collesium' from healthy bulbs planted at a depth appropriate for lilies, bearing in mind that many species in the genus naturally sit deeper in the soil and some form stem-roots above the bulb. Ensure the planting spot gives the emerging stem room to develop; stems bear the principal flowers through the summer months. Because this is a summer-flowering lily, expect its main display between June and August. In UK gardens it performs where a vertical summer accent is needed: add it to mixed borders where tall stems can be supported by the surrounding planting or sited toward the back of a border. Keep a record of bulb position at planting to make future lifting or division easier, and note the flowering season so you can plan companions that occupy the space before and after the lily’s summer display. Expect Lilium 'Collesium' (VIIa/b) to flower from June to August.
More in the Lilium genus
- Lilium 'Barbara North' (Ic/d)

- Lilium 'Conception'

- Lilium 'Delicate Joy' (Ia/b)

- Lilium 'Easy Samba' (Ia/c)

- Lilium 'Gracia'

- Lilium 'Halloween' (Ia/-)

- Lilium 'Mount Duckling' (Ia-b/b)

- Lilium 'Parasol'
