The Blue Royal Empress tree, also known as 'blue paulownia elongata', is a rare and unique flowering tree that stands out in the market. This non-invasive tree boasts spectacular blue flowers in the spring, adding a touch of elegance to any yard. With its fast growth rate, beautiful color contrast, and low maintenance requirements, the Blue Royal Empress tree is the perfect choice for those seeking a stunning addition to their landscape. (USDA Zones 5-9)