Forcing bulbs for indoor bloom
Bulbs made to flower at other than normal times are said to be forced. The practice of forcing is commonly used to flower daffodils, hyacinths, tulips, crocus and other spring bulbs during the winter. With proper planning and care, bulbs can supply color for the home from late November until early April, when they begin to flower normally outdoors.
Archive version. For the most recent information see extension.missouri.edu.