Acanthus hungaricus (Long-leaved bear's breeches): Architectural spires of purple/white flowers over large, dark green deeply divided leaves. Best in sun or light shade. Height to 1.2m

Astrantia major 'Abbey Road' (PBR) (Hattie's pincushion, Masterwort 'Abbey Road'): Dark red flowers on dark almost-black stems above green foliage. Grow in damp soil and good light for best colour. Long-flowering. Hardy. Up to 80cm. [Collect Only]

Campanula glomerata 'Caroline' (Clustered bellflower 'Caroline'): Tight clusters of lilac/purple flowers on short stems above neat, mat-forming foliage. Height about 30cm. Hardy.

Campanula Iridescent Bells = 'Iribella' (PBR) (Bellflower 'Iridescent Bells'): Purple buds open to silvery-lilac bells in summer. Prefers a moisture retentive soil. Height to 80cm. Hardy [Collect Only]

Centaurea 'Jordy' (Perennial cornflower 'Jordy'): Beautiful maroon-purple flowers over felty silvery-green foliage.

Centaurea montana 'Parham' (Perennial cornflower 'Parham'): Large lavender purple fluffy flowers over silvery-green foliage. To 40cm. Hardy

Centaurea montana 'Violetta (Perennial cornflower 'Violetta'): Large purple cornflower-like flowers over grey-green foliage. Very attractive to bees and butterflies. Up to 40cm. Hardy.

Erigeron 'Dunkelste Aller' (Fleabane 'Darkest of all'): Large purple daisy flowers over a long season in summer. Great in sunny, dry borders. To 30cm. Hardy [Collect Only]

Geranium pratense 'Dark Reiter' (Meadow cranesbill 'Dark Reiter'): Dark purple/bronze leaves with single purple flowers in mid-summer. To 40cm. Hardy

Hosta 'Devon Green': Elegant hosta with tapering, dark green, fine-veined leaves. Lilac flowers in summer

Hosta 'Empress Wu' (PBR): One of the largest leaved Hostas in cultivation - possibly the largest. Leaves up to 18" across when established. [Collect Only]

Liatris spicata 'Kobold' (Gayfeather 'Kobold'): Plump spikes of purple flowers in mid to late summer. Likes dryish soil in a sunny spot. To 80cm. Hardy [Collect Only]

Penstemon 'Raven': Darkest purple-red tubular flowers over semi-evergreen foliage. [Collect Only]

Perovskia 'Blue Spire' (Russian Sage 'Blue Spire'): Fine spikes of purple flowers on silver stems. Lovely winter stem effect. Hardy. Up to 1m.

Salvia nemorosa 'Amethyst' (Balkan Clary 'Amethyst'): Slender spires of long-lasting warm purple spikes from mid to late summer. To 90cm. Hardy. [Collect Only]

Salvia nemorosa 'Ostfriesland' (Balkan Clary 'Ostfriesland'): Masses of upright spikes of purple flowers in mid summer. Easy and trouble free. To 50cm. Hardy

Salvia verticillata 'Purple Rain' (Whorled Clary 'Purple Rain'): Purple flowers on slightly arching stems above soft, grey-green leaves. Hardy. To 60cm. [Collect Only]

Salvia x sylvestris 'Mainacht' (Wood sage 'May Night'): Spikes of warm purplish blue flowers in mid-summer. Height to 70cm. Hardy. [Collect Only]

Stachys officinalis 'Hummelo' (Betony 'Hummelo'): Upright spikes of rosy purple flowers above pointed dark green foliage. Very attractive to bees. To 50cm. Hardy.

Thalictrum delavayi 'Hewitt's Double' (Chinese meadow rue 'Hewitt's Double'): Tiny purple pom-pom flowers dance airily above ferny grey-green foliage. Height to 1.2m. Hardy [Collect Only]

Verbena bonariensis: Tall, airy but strong slender stems with flat heads of purple flowers in mid to late summer. To 1.8m. Frost-hardy. [Collect Only]

Veronicastrum virginicum 'Fascination' (Culver's Root 'Fascination'): One of the best cultivars with tall tapering spires of warm purple/blue flowers in mid-summer. To 1.8m. Hardy. [Collect Only]

Vinca minor 'Atropurpurea' (Small periwinkle 'Atropurpurea'): A compact mat-forming evergreen perennial with trailing stems of dark green leaves and dark purple flowers. Good in shade. Hardy ground cover.