This section is from the book "The Gardener V1", by William Thomson. Also available from Amazon: The New Organic Grower: A Master's Manual of Tools and Techniques for the Home and Market Gardener.
Can scarcely be had in large enough quantities where there is great demand for cut flowers, and its foliage is a good substitute for Fern-leaves when they are scarce. It also stands long in the conservatory when properly and gradually hardened off, but it soon decays if brought at once from a moist and high atmosphere. Its treatment is much the same as the Lily of the Valley. It should not be too often disturbed at the roots. When done flowering, care should be taken that they do not receive a check in the growth and ripening of their foliage by exposure to frost or cutting winds in spring. They should be placed in a pit or frame, about the same temperature as the house in which they stood while in bloom. Here let them stand until all danger of frost is past, when they can be plunged out of doors. Never let them suffer for the want of water. When the earliest begin to show signs of the foliage changing colour, lift them and place them in a cold frame, giving no more water than keeps them from flagging; and let them have all the sun possible, keeping the lights rather close for a short time, which will help to ripen them better.
Before starting them, we generally take them to the potting-bench, examine the drainage, remove all the loose soil from among the crowns, but not to injure the roots, giving a top-dressing and watering, placing them in the Mushroom-house, where they come quicker and finer than any other place when early forcing is required.