Maintenance
Serviceberries are prone to a number of diseases, including rusts, fireblight, powdery mildew, and Entomosporium leaf, and insects such as elm aphid, saskatoon, sawfly, mites and leaf rollers. Prune as described above to reduce chances of diseases, and plant insectary crops such as Queen Anne's lace, white clover, cowpea and yarrow nearby to keep insects under control.. Prune to an open form in order to increase light and air flow though the plant, and reduce the chances of disease. For the first three years, only remove low branches and dead, or diseased stems. In order to maximize berry production, start regular pruning after the plant reaches about 6 feet tall (3-6 years), and regularly remove older branches.