Set options: Choose from a single tree or a set of two trees. Decorative: Produces clouds of lovely sky blue flowers in clusters during spring. Maintenance: Easy to maintain and hardy to about -8C, happily withstanding all but the severest of winters. Supplied: Delivered as a standard lollipop form tree in a 3L pot with a varying tree height of 80-90cm tall. Tree: Get a Californian lilac tree. | Californian Lilac Tree (Hardy Ceanothus) | Wowcher