The most popular being Tibouchina Alstonville and Tibouchina Jules.

Alstonville grows shrub-like into a small tree massed in purple flowers throughout the autumn, while Jules is the baby, growing to half a metre, making a beautiful display if mass-planted.

Many spring/summer flowering lavenders have finished blooming.

But now Lavender Blueberry will flower for months, still giving the garden their magnificent blue/purple hues.

There are some great border plants available released by PGA - they are excellent fillers, particularly Convolvulus Two Moons, which is a hardy ground cover, bearing white flowers with an occasional mauve bloom, which creates a dappled effect across the entire plant.

Also available is Convolvulus Full Moon, which becomes covered in pretty mauve flowers, making a colourful, dense ground cover for borders and rockeries.

For a mass of purple, plant Verbena Purple Passion - this evergreen ground cover grows in full sun, and even part shade.

Plant a row of Tulbaghia Fairy Star, which is grass-like, bearing tall stems of pretty mauve blooms behind the intense colour of the verbena.

If you have a hot spot, plant Sedum "Purple Blob" - it grows into a mound of rosette-like leaves.

This unusual plant is wonderful for pots, where it will gradually extend to the edge and cascade over.

These blues and purples make a great display when matched with my favourite colour, pink.

They really highlight my most favoured shrub - Breynia nirvosa or Snow Bush - I love this pretty little shrub, which has soft leaves of pink, white and green.

Breynia require a warm, sunny spot and a little care during cold winters.

If a taller plant is required, try Loropetalum Plum Gorgeous, which has plum/purple leaves and pretty pink flowers.

This shrub could be bordered with Dianthus Sugar Plum, which has a beautiful perfume.