Blueberry plants are normally propagated by taking cuttings from the mother plant, but the main plant also produces suckers. These blueberry suckers are attached to the root system of the established mother plant and can be easily detached and replanted when you want to increase the number of blueberry bushes in your garden. New blueberry plants should be propagated from root suckers during the dormant period of the blueberry plants, which occurs during the winter months.
Select blueberry sucker plants that have been growing from the main blueberry bush for at least two years. By selecting older suckers that have more maturity, you are more likely to be successful in transplanting the roots. Blueberry plants that have been growing with heavy mulch around the base usually produce an abundance of sucker plants.
Dig carefully around the sucker plant you plan to move so that you do not injure the roots of the sucker or the main blueberry plant. Look for the main root that connects the blueberry sucker to the mother plant.
Separate the blueberry sucker from the main plant root by using a sharp shovel. Once you have separated the sucker from the mother blueberry plant, plant the sucker root as you did the original mother plant.
Prune the sucker top back to severely so that it is only 10 to 12 inches tall, and remove all bottom branches. New blueberry sucker plants have a shallow root system, so by pruning back the top of the newly planted blueberry sucker, you allow it to strengthen and establish its roots. If you do this, your transplanted blueberry sucker will have a much better chance of surviving and flourishing.