Lilium Regale is probably the most popular of the Trumpet Lilies, in fact, it is probably the most popular lily bulb we sell
Source: TreeGuy
How to grow Trumpet lilies
Lily bulbs are best planted in the spring.
Lilies prefer alkaline soils.
Planting lilies in the garden
If grown in the garden, lilies prefer well-drained alkaline soil. If you’re unsure of your soil type, it’s best to plant your lilies in a pot/container.
Arrange the lilies in groups of odd numbers.
Plant the bulbs about 12-20cm (5-8″) apart. Spacing between groups is at least 60-90cm (2-3ft) apart.
Plant the bulbs with a 10-15cm (4-6″) layer of soil above them.
Planting lilies in pots
Find a location with full sun or partial shade, well-drained soil.
Arrange the lilies in groups of odd numbers.
Grow 3 bulbs in a 10-14″ ”yard type” pot using good quality, all-purpose compost
Plant the bulbs with a 10-15cm (4-6″) layer of soil above them.
Make sure there is enough drainage.
