Flowering pear trees, primarily Pyrus calleryana (Callery pear), are popular, fast-growing ornamental trees known for dense, white, early-spring blooms and vibrant red/purple fall foliage. They grow 30-50 feet tall, are highly adaptable to pollution, and require full sun. While popular for landscapes, they are structurally weak and considered invasive in many regions. Grows best in USDA Hardiness Zones 5 through 9