To force blooms Remember that in general, the closer to a shrub's normal blooming time, the faster you can force blooms. Dormant shrubs will not force well, so look for branches with lots of buds. When the buds are obviously swelling, cut off the branches you wish to use. Make sure you cut them on a day when the temperature is above freezing. It's also a good idea to look for branches that should be pruned anyway, so you won't spoil the shape of the shrub for its regular spring show.
Moisture begins the process, so lay the branches in lukewarm water overnight.
A bathtub will work fine. The next day, wrap the branches in moist newspaper and place in a vase filled with lukewarm water. Slit the end of the stem two to three inches so the branch will absorb more water. Keep the branches moist by changing the water regularly and misting the branches. Since central heating causes most homes to be extremely dry, place them in a cooler part of the house.