Aster x frikarti Monch and Aster amellus King George more details
Aubrietia canescens –Purple Cascade is a hardy perennial that flowers in the spring and will drape itself over a bank or wall for a gorgeous splash of early colour in the garden
Campanula Trachelium or Bellflower is a hardy perennial that reaches to 2-3 foot or 60cm-1m. It likes to grow in moist but well drained soil in a sunny spot and has wide bell shaped blue flowers in the summer months.
Cynara cardunculus or Cardoon is a dramatic plant that has silver grey leaves and large thistle like purple flowers in the summer. It is only half hardy and needs a sunny sheltered spot with fertile well drained soil. Grows to 6 foot or 2m.
Delphiniums- no English Garden should be without some of these. Try any of these varieties - Black Knight, Chelsea Star, Mighty Atom, Bruce or Fanfare. They like a sunny area with fertile well drained soil and flower throughout the summer.
Geranium sylvaticum Mayflower or Cranesbill is an upright hardy perennial that has cup shaped violet flowers in the early summer. In likes to have a partly shaded spot in well drained soil
Hebe E.A. Bowles is a small evergreen bushy shrub with glossy pale green leaves that has lilac flowers from midsummer to late autumn. It needs to be in a sunny sheltered spot with well-drained soil.
Lavender angustifolia –Hidcote is an evergreen small bushy shrub that has very fragrant deep purple flowers from mid to late summer more details
Lunaria annua, Honesty – Munstead Purple is a spring flowering biennial that will grow in sun or part shade. more details
Salvia nemorsa or May Night is a clump-forming hardy perennial that has violet blue flowers all summer. It prefers to grow in a sunny spot in fertile and well-drained soil.
Stachy macrantha Superba is a clump forming hardy perennial that has purple/violet flowers in the summer. It grows to 12 to 18 inches or 30 – 45 cm and likes a sunny spot.
Pansies –Universal Purple or Delta Pure Violet
Phlox Paniculata- Amethyst – has violet flowers with a light fragrance.
Platycodon grandiflorus or Balloon Flower has beautiful bell shaped flowers in the summer. It is a hardy perennial and grows to 18-24inches or 45-60cm.
Thalictrum aquilegiifolum chelidonii - despite its long name it is a delightful flower with fluffy violet blooms in summer. It is a hardy perennial with grey green leaves that prefers a sunny spot with well drained soil.
Veronica langifolia Romily Purple. A hardy perennial that prefers well drained soil in a sunny area of your garden. Grows to 3-4 foot or 1-1.2m.
Viola – Roscastle Black is a rich deep purple.
Enjoy your garden!