This is a delightful self-seeding annual with intensely blue flowers in summer and autumn.
The so-called angel's trumpets are exotic-looking shrubs that create a tropical look in Sydney gardens.
With its violet flowers fading to pale blue then white, this is a pretty shrub for the spring garden.
An annual form of the flowering tobacco plant has spires massed with tiny lime-green tubular bells
This is a rambling shrub with rounded purple flowers, which can be trained as a standard.
A long-flowering shrub in late winter and spring, with brilliant orange flowers.