Three things are essential to success in the culture of bulbs in the house:
First—Good stock.
Second—Good soil.
Third—Root development before top growth takes place.
The first essential is readily met if you order your bulbs from reliable dealers—dealers who have established a reputation for honesty and the handling of bulbs of the best quality only. Each season we see advertisements in which large collections of bulbs are offered at very low prices. Beware of them. As a general thing the wonderfully cheap ones are as cheap in quality as they are in price, and from such a grade of bulbs you cannot expect fine flowers. The best bulbs are imported ones, grown largely in Holland, where both soil and climate are admirably adapted to the production of first-class stock, and where the matter of bulb-growing has been reduced to almost a science. These will cost a little more than American-grown ones, but they are well worth the difference in price. Inferior stock will give inferior flowers every time, and what one wants in forcing bulbs in winter is the best flowers possible.
The item of good soil is a most important one. Bulbs can be grown, after a fashion, in almost any kind of soil, but they can only be grown to perfection in a soil whose basis is a sandy loam made quite rich with some good fertilizer. Heavy soils can be made lighter by mixing sharp, coarse sand with them until the mixture, after being squeezed tightly in the hand, will readily fall apart after pressure is relaxed.
The ideal fertilizer for all bulbs is old, thoroughly rotted cow manure. On no account should fresh manure of any kind be used. But it is not always possible to procure manure from the cow-yard, and those who are unable to do so will find fine bone meal a good substitute. Use this in the proportion of a pound to a half-bushel of soil. Whatever fertilizer is used should be thoroughly mixed with the soil. Be very sure that the latter is free from lumps.
In potting bulbs for winter use I would advise putting several in the same pot. Fill the pot loosely with soil, then press such bulbs as those of the hyacinth, tulip, and narcissus down into it just their depth. As many can be used in a pot as can be set on the surface of the soil in it so that they just touch one another. Do not attempt to make the soil firm about them or beneath them. If this is done their tender roots will often fail to penetrate it, and the consequence will be that the bulbs are hoisted upward as the roots develop. This should be guarded against by having the soil so light that the young roots will find no difficulty in making their way into it. I advise the use of several bulbs in the same pot because it gives a greater amount of bloom in a limited space, and greatly economizes in soil, pots, and labor.
When you have put your bulbs into the soil, water them well, and then set the pots away in a place that is cool and dark. Some persons consider this unnecessary, and put their plants in the window as soon as potted. This is all wrong. Storage in a cool, dark room until roots have formed is absolutely necessary to success. The reason for it is plain if we stop to think that the bulbs must have roots before they can make a satisfactory growth of top. Roots first, flowers afterward.