Caryopteris 'Dark Knight'
This blue mist spirea variety has the deepest blue color of them all. Its tidy upright growth habit and profusion of flower spikes is a great performer in any landscape. Use as a hedge or a group planting in front of low retaining walls. This plant will grow in every light condition except full shade. Can reach heights of 48" with the same spread but can be trimmed to control its size. Drought, deer, and rabbit resistant, it will attract butterflies, bees and hummingbirds.