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.
The Asters proper are ornamental border plants, many of them being so coarse and vigorous in growth as to need thinning out considerably year after year. A fair trade is done by nurserymen in some of the choicer kinds, while some of the taller and more vigorous varieties are highly valued by florists during the late summer and autumn months. Almost all kinds are easily grown in ordinary garden soil, or even the poorest soil, and may be increased by division. Of late years many charming seedling varieties have been raised by intercrossing different species and varieties. The following is a selection: -