Plumbago capensis 'Royal Cape'
As a blue flowering shrub this is one of the best for purity of colour but it is a nightmare to grow if you are not prepared to keep it under control. Given a tough dry spot in poor soil seems to be the way to treat it while giving it a bare amount of fertilizer to stop the leaves from going yellow. Under ideal conditions to will reach 5 metres up trees or sucker and grow through concrete. It is often grown as a hedge plant but as it flowers for such a long part of summer and well into autumn, it means cutting off most of the flowers to keep it in shape so why bother using it as a hedge . It sometimes gets the common name of Leadwort as the underside of the leaves have a grey bloom similar to lead. It is also a bit of a sticky shrub so be prepared to be covered in spent flower heads if you go anywhere near it.
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