Begin the propagation process by cutting an 8-inch branch from the blueberry bush. The best time to take the cutting is early in summer, after the spring flush of plant growth. Prepare the branch by clipping off all leaves from the lower half and dipping the bottom cut end into a powdered rooting hormone.
The woody stem of blueberry branch will produce roots when the bottom end is inserted into a propagation tray filled with moist rooting soil. The best place for the propagation tray is the top of a refrigerator where the temperature is approximately 70 degrees Fahrenheit. Keeping the soil moist and warm will create the optimal environment for root growth.
The blueberry branches will produce roots approximately six to eight weeks after starting the propagation process. The branches can be transplanted to individual growing containers once the roots are at least 1 inch long. Grow the branches indoors for at least one year before transplanting them to an outdoor garden.