Stop using fertilizer after the blueberry bush has ended its blooming period. Fertilizing promotes fall growth and can cause damage during the winter, according to the University of Minnesota Extension.
Remove any dead foliage in the fall to prevent diseases and possible pests during the winter. Prune back—before winter—all canes that could break because of the weight of snow.
Discontinue watering blueberry bushes after early September unless the soil is very dry.
Apply a layer of organic mulch such as pine needles or wood shavings. Mulching will keep the ground warm and protect the roots from the cold.
Cover the blueberry bush with a burlap bag tied with twine to prevent cold and snow damage. Remove the burlap in the spring.