(Quart) CATAWBA Crape Myrtle - Spectacular, Deep Purple Flowers, Attractive Foliage in Every Season. CRAPE MYRTLE 'CATAWBA' Quart Size Plant Deep Purple Blooms. Foliage has bronzy cast in spring, bright green in summer, orange-red fall color. 8-12" tall, 1-2 yr old Mature size is 15 ft tall, 14 ft wide. Blooms in Summer Full sun. Hardy in zones 7-9 Mildew Resistant