Plumbago is an evergreen shrub with whip-like semiwoody stems that form a loose, rounded mound 3-10 ft high with a similar spread. Plumbago can be pruned to grow like a vine and scramble over supports, or pruned into a more compact mounded shrub, or left to sprawl with its long, gracefully arching branches.
The 2 inches oblong leaves are a fresh, light yellowish green color. The sky blue flowers are 1 inch long tubes expanding into 5 petals spreading about 1 in across.
The flowers are borne in rounded terminal clusters 6 inches across and look quite a bit like phlox flowers. Plumbago blooms all year long except for the coldest winter months.
A white flowered variety is available. The cultivar, 'Royal Cape' has intense cobalt blue flowers.