It will take at least three years for a blueberry plant to become established and healthy. Remove all blossoms as they appear in the first 1-2 years. Prune off any diseased and damaged wood during the first dormant season. After their second year, blueberries should be pruned annually.
Blueberry plants have a naturally bushy form, but the number of branches should be limited to the age of the plant, up to a maximum of 6 to 8 branches for old bushes. Yearly remove 1-2 branches so that no branches are over 4-6 years old. Prune out suckers and weak wood, especially from the top of the plant.