Harvest quince fruit in fall once it develops a golden color and strong fragrance. The fruit is typically firm and should be handled carefully to avoid bruising. Prune quince during late winter or early spring while the plant is dormant. Remove dead, damaged, or overcrowded branches to improve airflow and light penetration. Light shaping helps maintain structure and encourages productive growth. Avoid excessive pruning, as it may reduce flowering and fruiting. Regular maintenance supports healthy growth, improves fruit yield, and enhances the plant’s overall appearance, making it both ornamental and productive in garden landscapes.