Forcing Shrubs to Bloom in Winter
The first step to force branches during winter is collecting the stems. Choose branches with fat buds that indicate the shrub has broken dormancy. The branches will bloom no matter where you make the cuts, but you can help the shrub along by using good pruning practices when you cut them. This means selecting branches from crowded parts of the shrub and making the cuts about one-quarter inch (6 mm.) above a side branch or bud. Cut the branches 2 to 3 feet (61-91 cm.) long and take a few more than you need because there are usually a few that refuse to cooperate with winter bloom forcing. Once you get them indoors, you can trim them to suit your container and arrangement. After trimming the stems to the desired length, prepare the cut ends by crushing them with a hammer or making a 1 inch (2.5 cm.) vertical slit at the bottom of the branch with a sharp knife. This makes it easier for the stems to absorb water. Place the branches in a vase of water and set them in a cool, dimly-lit location. Change the water every day or two to prevent bacteria from clogging up the stems. When the buds begin to swell and open, move them into bright, indirect light. The blossoms will continue to bloom for two to five weeks, depending on the type of shrub. Floral preservatives will help prevent the growth of bacteria, which prevent the uptake of water. You can purchase a floral preservative or use one of these recipes:
2 cups (480 ml.) of lemon-lime soda ½ teaspoon (2.5 ml.) of chlorine bleach 2 cups (480 ml.) of water
Or
2 tablespoons (30 ml.) lemon juice or vinegar ½ teaspoon (2.5 ml.) of chlorine bleach 1 quart (1 L.) of water
Shrubs for Winter Bloom Forcing
Here is a list of shrubs and small trees that work well for winter forcing:
Azalea Crabapple Purple leaf plum Forsythia Quince Witch Hazel Flowering cherry Flowering dogwood Pussy Willow Flowering pear Jasmine
