Like all rose of Sharon varieties, ‘Blue Satin’ is a shrub that you can easily train into a tree, and it will give you plenty large, round violet blue flowers with dark purple veins and c… See more

There are many California lilacs with blue flowers, but ‘Victoria’ is unique because it has the purest indigo hue you can find. The flowers are so profuse and thickly packed that they wi… See more

Orchid trees are so called because their blooms are so exotic and showy that they look like, well, orchids, and the rare ‘Blue Hong Kong’ has an unusual color for this species: pa… See more

Empress tree, princess tree or simply Paulowniais known as the fastest growing tree on Earth, and it too has flowers that can be lilac blue, though most varieties are lilac pink. Y… See more