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 [Collect Only]

Astilbe chinensis var. taquetii 'Purpurlanze': A very tall form with statuesque fluffy purple flowers above fresh green ferny foliage. Excellent for damp or shady spots. Hardy. Up to 1.2m. [Collect Only]

Campanula 'Kent Belle' (Bellflower 'Kent Belle'): Tall upright stems with deep violet, narrow drooping bell shaped flowers above dark green foliage. May need some support. Hardy. To 1.2m.

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.

Hosta 'Fireworks': Gleaming ivory leaves with multi-hued green leaf edge markings. Very upright habit. To 50cm. Hardy. [Collect Only]

Hosta 'Frances Williams': Large heart-shaped crinkled leaves with a prominent green-yellow margin. Lavender purple flowers in mid summer. Hardy. Up to 75cm.

Hosta 'Golden Tiara': A medium sized hosta with leaves up to 10cm and vibrant green leaves edged in yellow. Deep purple flowers on stems up to 50cm. Hardy. [Collect Only]

Hosta 'Halcyon': Medium sized Hosta with attractive blue-grey heart-shaped leaves and pale lavender purple flowers. Hardy. Up to 40cm.

Hosta 'June': A popular cultivar. Glaucous blue green heart-shaped leaves with yellow-green variegation in the leaf centre. Purple flowers. Hardy. Up to 50cm.

Hosta 'Krossa Regal': A robust variety with tall grey-green leaves with deep veins. Lilac flowers in mid-summer. Also good in containers. Hardy. Up to 1m. [Collect Only]

Hosta 'Patriot': Large green leaves cleanly edged in white. Lilac flowers in summer. To 50cm. Hardy.

Hosta 'Sum and Substance': Large, bright green leaves. lavender flowers, good in shade or sun. Hardy. To 60cm high and wide. [Collect Only]

Ophiopogon planescapus 'Nigrescens' (Black lilyturf): Jet back strappy leaves and purplish flowers in mid-summer. Widely and rightly used in modern planting schemes against silvery plants and paving.

Penstemon 'Sour Grapes' (Syn. Stapleford Gem): Purple-blue tubular flowers with a metallic sheen and patches of white in the throat. Protect from hard frosts. To 60cm.

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. [Collect Only]