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.
This presents no greater difficulty than that of growing a crop of potatoes, and both may be muddled at and not grown. A fair depth of well-worked, moderately rich soil, frequent changes of site where possible, the land preferably manured for a previous crop, annual lifting, and replanting in August and September are among the chief points to be remembered. Where the biennial lifting of second-sized bulbs is contemplated, a thinner planting should be indulged in. Where the land is manured at planting time the manure should be buried at least 6 in. below the bulb-planting level. For light land I consider cow manure, because of its cool nature and moisture-retaining attributes, the best to use, though in this I am not very fastidious. Mulching with manure I regard as waste of time and material; moreover, the manure is presently in the way of the hoe, which should be kept in constant use during the spring months.
Flower gathering should be done in the bud state, the flowers to be opened in water under glass. This is of far-reaching importance equally when the crop is grown in smoky districts or near dusty highways, the latter sending clouds of dust far away into the fields by reason of the disturbing influence of the ubiquitous motor car. The bunching of these outdoor-grown crops only differs from these earlier ones in not being usually backed by foliage. Accompanied by foliage a slightly increased price may be realized, though this depends not a little on supply and demand, the consensus of opinion being that it does not pay when the markets are glutted with the flowers.