One of the most loved and known of the summer-blooming flower, the tall garden phlox is a staple in many perennial gardens. The Blue Boy variety is no exception! The individual, slightly fragrant blue-purple flowers grow to 1" across and form in clusters up to 6" wide in July and August. A second re-blooming can often be experienced in fall if deadheading is performed. Also, one of the most mildew resistant varieties!