Sioux bears dark-pink flowers that bloom from late July to late October. Expect this hybrid crape myrtle to reach about 15 feet in height with a lesser spread. Bark is a medium gray-brown; fall foliage, a vivid red to purple. Very high mildew resistance.
Note: Regardless of hardiness zone, all crape myrtles are subject to die-back at temps below 15 degrees. Probability of this happening is increased by pruning in fall or winter. Prune only in earliest spring. Bloom will be on new wood.