Thunderstruck™ White Lightning™ Crapemyrtle (Lagerstroemia x 'JM4') is a fast-growing, deciduous tree reaching 20–30 feet tall and 10–15 feet wide, noted for its intense white flower clusters contrasted against dark, near-black foliage. Suitable for USDA Zones 6–9, it thrives in full sun and is highly resistant to powdery mildew.