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.
Among plants grown for the beauty of their foliage the Cordylines are very popular, and large numbers are disposed of for decorative purposes. Although nearly all of them are by botanists placed in the genus Cordyline, they are usually called Dracaenas. The hardiest is the New Zealand G. australis (often erroneously called Dracaena indivisa, a quite different plant). Seed of G. australis is at times readily obtained, even from plants grown out-of-doors in particularly favoured parts of the country. It should be sown at once, and in a temperature of 60° to 75° F., and the young plants will soon appear. The growth is far more rapid if they are grown for some time in a warm structure. Clean, well-furnished plants in 5-in. pots meet with a ready sale at 10s. to 12s. per dozen for table decoration and other purposes, while larger ones are used for summer bedding or for furnishing large halls or corridors that are too draughty for more tender plants. A variegated-leaved form of this, known as Doucettii, is very choice. Other green-leaved kinds nearly related to the preceding are Bruanti, congesta, and Eckhautei.