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 prices for plants naturally vary. They are sold in Covent Garden as low as Is. per box of fifteen, plants all named, and mostly purchased by the barrow men. As a general rule, stock true to name is worth 12s. to 20s. per 100 wholesale, while more modern varieties will make 20s. to 30s. per 100. The cut flowers are bunched in dozens, in most cases for a cheap market trade. They are also packed in boxes containing a gross of flowers. They are greatly in demand for harvest festivals.