Buddleja `Blue Chip` is a new and distinct variety of butterfly bush that has the following unique combination of desirable features that are outstanding in a new variety. 1. Moderate vigor resulting in compact growth habit. 2. Ease of asexual propagation using softwood or semi-hardwood cuttings. 3. Spreading growth habit with multi-branched stems. 4. Male sterility, and low female fertility and reduced seed set, resulting in less opportunity for seedlings to originate in the landscape setting. 5. Blue flower color.