Stump your garden buddies with this one! Berkheya Purpurea “Zulu Warrior” is a striking tender perennial from South Africa which has an outrageously impressive show of very pale purple-white flowers with dark purple centres. They are definitely a bloom with class and make a useful cut flower, fresh or dried.

Buddleia blooms all summer long with an intoxicating scent just as overwhelming as their colour show. There is no denying that these shrubs are butterfly magnets. If you plant one, they will find it. Have your camera ready!

This beautiful highly versatile, aristocratic border plant has become very much in vogue in recent years. Oval, fleshy blue-green leaves spiral up the stem with tightly packed, sea blue bracts - and then the finale - small clusters of rich purple-blue tubular, nodding flowers which are adored by bees.

Datura metel is a showpiece in any garden, it boasts some of the largest and showiest blooms available on an easy-to-grow annual. 'Double Purple' has double flowers that are dark purple with creamy colour centre. Also known by the mouthwatering moniker "Blackcurrant Swirl"

Although some Datura are without fragrance, this particular plant produces flowers with a delicate, slightly spicy perfume that permeates the air. 'Lilac Le Fleur' is pale lavender with dark purple centre. The plant will bloom profusely throughout summer until the weather cools in autumn.

Dierama “Blackberry Bells” is a vigorous hybrid Dierama. It has inheriting some of the darkness from 'Cosmos' but with much larger, deep purple-maroon flared trumpets that dangle from graceful arching stems. A desirable addition to any herbaceous border or gravel garden.

Dragon's Head is an extremely useful plant, a low growing perennial that makes dense clumps of basal rosette with broad leaves and upright to arching spikes with large dark blue flowers. Use it in rockeries or as a groundcover, it is easily cultivated in any rich, very well drained, rather rocky soil in full sun.

With good summer colour Erigeron “Azure Fairy” have similar flowers to the autumn blooming Michaelmas Daisies, but produce a summer-long display over a bushy clump of green foliage. They will grow at a fast rate in any reasonable well drained garden soil.

A beautiful, robust ground cover variety of the every popular Geranium sanguineum; ‘Vision Violet’ produces masses of large luminescent violet flowers from early spring to summer. The blooms cover this compact, mounding plant with intricately cut leaves.

Dames Rocket produce flowers varying in colour from deep rich purple, through all the paler lilac shades to white. Highly attractive to bees and other beneficial insects, the fragrant flowers perfume the air in late spring and early summer evenings.