This section is from the book "Commercial Gardening Vol2", by John Weathers (the Editor). Also available from Amazon: Commercial Gardening, A Practical & Scientific Treatise For Market Gardeners.
Of the thirty or more species in this genus the most popular is A. italica, and especially the "Dropmore" variety, which has tall branching trusses of brilliant blue flowers. It is a lovely border plant, and might also be grown largely for cut bloom. It flourishes in rich and well-drained garden soil, and is best kept true by division rather than from seeds. A newer variety called "Opal" is also excellent.
Fig. 182. - The Kew Belladonna Lily.