By making spring come early you can enjoy blooming daffodils, tulips and other bulbs inside in February. Most spring blooming bulbs are dormant during the summer. As the soil cools in the fall the bulbs begin to send out new roots. This will continue until the ground freezes. As the ground warms in the spring the bulb comes to life and by using the roots it already has it can send up its flowers quickly.
Crocuses require the least amount of time and so are among the earliest spring bulbs to bloom.
Dwarf Irises, like crocuses, require only about six weeks. Hyacinths prefer 12-15 weeks. Daffodils need at least 12 and are better with 16 weeks, as are tulips. So by starting a bulb's required chill time early, we can force them to bloom early. It is important to remember not to scrimp on their chill time.