Cardamine quinquefolia: Light purple flowers emerge very early in spring, with attractive deeply divided leaves. Foliage dies down in summer. [Collect Only]

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

Cynara cardunculus (Cardoon): Dramatic, tall silver leaved plant topped with large purple thistle flowers in mid-summer. Hardy. Up to 2.5m. [Collect Only]

Epimedium grandiflorum 'Purple Pixie' (PBR) (Barrenwort 'Purple Pixie'): Unusual reddish-purple flowers with prominent white spurs, held on wiry stems above the heart-shaped leaves. Hardy. Up to 30cm.

Geranium wlassovianum: Warm purple flowers over attractive velvety foliage. Excellent autumn foliage colour.

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

Liriope muscari 'Big Blue' (Blue turf lily 'Big Blue'): Spikes of vibrant purple flowers in autumn, larger than the usual form, evergreen strappy foliage. Good for dry shade. Hardy. Up to 50cm

Liriope muscari 'Royal Purple' (Blue turf lily 'Royal Purple'): Spikes of deep purple flowers in autumn above dark-green evergreen strappy foliage. Can tolerate dry shade. Hardy. Up to 50cm.

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

Pulsatilla vulgaris (Pasque flower): Large cup shaped purple-hued flowers over soft ferny foliage. Thrives in sunny, well drained spots. To 40cm. Hardy.

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]

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]