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.
In the forcing department a matter of primary consideration is catching the early markets, since a few days - one had almost written hours - might mean a difference of pounds in the total returns of the crop. To ensure catching the early markets an early start must be made, growing in conjunction therewith only those kinds which experience has proved to be amenable to hard forcing. An equally important factor in the case is that of securing hard, well-ripened bulbs, since grossly grown, flabby, manure-gorged bulbs are the least calculated to bear the strain, or in the end to produce characteristic, well-balanced, or good-coloured flowers. The bulb, therefore, that is as hard as the proverbial stone, and of moderate size according to its kind, is the one that roots best and responds most promptly to artificial heat.
ERICA HYEMALIS AS GROWN FOR MARKET.
CYCLAMENS AT AN EXHIBITION.
By an "early start" the months of August and September are meant, and all bulbs intended for early forcing should be planted within these limits. Where the bulbs are being supplied from a distance everything should be in readiness, and the work begun promptly on receipt of the bulbs.