Credit: International Bloembollen Centrum, Hillegom Holland

The Calla lily, once only available in white, is now wearing a veritable rainbow of colours. Calla lilies are a lovely cut flower, and you can extend their vase life by leaving a little of the white part of the stem attached when trimming. This will help the elegant lilies last for as long as three weeks in a flower arrangement. Related links: Calla lily video