The Alstomeria 'Friendship' was selected as a BEST BUY Alstomeria by Which?. These are a brilliant source of sparkling colour (grows to 100 x 50cm - it is available from Viv Marsh Postal Plants).
Pair it with the deep salmon pink evergreen perennial, Diascia personata (grows to 60-90 x 45cm - it is available from Hopleys).
Another great companion is Ferula communis. This is a tall fennell with long-lasting cascades of acid yellow flowers and mounds of lacy light-green leaves (size: 250-400 c 50-100cm - available from Beth Chatto Gardens).
Try also Digitalis purpurea f.albiflora. Some maintain that there is nothing more beautiful than these wild foxgloves. These are usually biennial (size 250 x 50cm - available from Crocus).
Finally: Clematis x durandii. This is an unusual clematis; it doesn't clime but wanders aimlessly through adjacent plants. It doesn't get clematis wilt and flowers for months. It is described as a non-climbing sub-shrub (grows to 150 x 150mm - available from Burncoose Nurseries).
All these plant like sun or partial shade and need well drained soil. Although the Digitalis doesn't like the soil too dry.
