Baptisia 'Purple Smoke' (Indigo weed 'Purple Smoke'): Tall spikes of violet pea-like flowers on almost black stems, attractive grey-green foliage. Dark-grey seed pods. Hardy. Up to 1.2m

Echinacea purpurea (Coneflower): Large rosy-purple daisy-like flowers with a large brown central cone. Very attractive to bees and butterflies. Long flowering season [Collect Only]

Echinacea purpurea 'Green Twister' (Coneflower 'Green Twister'): A new variety with a unusual mix of purple and lime green flowers with upturned petals and a central dark cone. Hardy. Up to 60cm.

Heuchera 'Midnight Rose' (PBR): Darkest purple leaves, splashed with bright pink. Excellent for all year round foliage colour. Hardy. Up to 30cm. [Collect Only]

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

Lavandula angustifolia 'Hidcote' (English Lavender 'Hidcote'): Classic English Lavender. Compact variety, ideal for path edging. To 40cm. Hardy

Penstemon 'Pensham Plum Jerkum': Plum-purple tubular flowers with white throat markings. Semi-evergreen in milder areas. Protect from hard frosts. To 70cm.

Pulsatilla vulgaris 'Papageno' (Pasque flower 'Papageno'): The petals are deeply dissected, giving a frilled, double effect. Usually purple but can be pink, reddish or white. Hardy. To 30cm

Salvia 'Amethyst Lips' (PBR) (Sage 'Amethyst Lips): Bicolour flowers in white and deep purple and delicious scented foliage. Half-hardy, copes with -5C in a sheltered spot. To 1m.

Salvia greggii 'Emperor' (Autumn sage 'Emperor'): Masses of maroon-purple flowers and delicious scented foliage. Half-hardy, copes with -3 to -5C in a sheltered spot. To 60cm. [Collect Only]

Thalictrum 'Splendide' (Rue 'Splendide'): Superb Thalictrum with clouds of purple flowers open for a very long time in late summer. Hardy. Up to 1.5m

Thalictrum aquilegiifolium 'Thundercloud' (French meadow rue 'Thundercloud'): Plumes of purple flowers with darker purple stamens in early summer. Height to 1m. Hardy.

Thalictrum delavayi (Chinese meadow rue): Dainty lilac-mauve flowers 2cm in width, with prominent creamy yellow stamens above fern-like bright green leaves. Hardy. Up to 1.5m.

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

Thalictrum delavayi 'Hinkley' (Chinese meadow rue 'Hinkley'): Dainty lilac-mauve flowers, with prominent long yellow stamens above fern-like bright green leaves. Hardy. Up to 1.5m.

Thalictrum delavayi var. acuminatum (Chinese meadow rue): Sprays of lilac flowers, soft ferny foliage. May need a little support. Lovely in dappled shade. To 1.5m.