Blue Plumbago, Cape Leadwort. Unusual blue color for tropics! Blooms all year round with denser blooms from March to November. Plumbago is popular in both tropical and sub-tropical gardens because of its delicate blue flowers, it is seen often as a low plant used for hedges. It tolerates both drought and poor soil, grows best if it is heavily pruned from time to time, even cut back to the ground. Learn more about Plumbago: Sky Blue Plumbago in Southern Landscapes.