Amsonia hubrichtii (Hubricht's bluestar): Clumps of soft feathery green foliage and palest blue star-like flowers in late Spring. Textural plant. Attractive autumn colour. Up to 60cm. Hardy

Armeria maritima 'Rubrifolia' (Thrift 'Rubrifolia'. Syn. Armeria maritima 'In the Red'): Clumps of narrow bronze foliage topped with spheres of bright pink flowers. An old-fashioned cottage garden favourite

Armeria maritima 'Splendens' (Thrift 'Splendens'): Cushion-forming with linear dark green leaves, bright carmine pink flowerheads. Max Height 25cm. Flowers May to June. Full sun. Hardy.

Aruncus aethusifolius (Goat's beard): Lovely fresh ferny foliage which turn golden in the autumn. Spikes of creamy white flowers in early summer. Hardy. Up to 50cm.

Baptisia australis var. minor (Dwarf blue false indigo): A compact form of Baptisia australis. Purple-blue flowers like a lupin with bright green trifoliate leaves. Prefers a sunny spot. Hardy. Up to 50cm

Dicentra 'Stuart Boothman' (Bleeding heart 'Stuart Boothman'): Deep pink flowers held above blue-green ferny foliage. Likes a sheltered spot in dappled shade, not too dry. Hardy. Up to 35cm.

Dicentra formosa f. alba: Pure white flowers held above blue-green ferny foliage. Likes a sheltered spot in dappled shade, not too dry. Long flowering. Hardy. Up to 35cm. [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.

Echinacea purpurea 'Virgin' (Coneflower 'Virgin'): A very good pure white form with central golden cone.

Eryngium 'Pen Blue' (Sea Holly 'Pen Blue): Electric-blue thistle-like flowers with a spiky collar and silvery-green foliage. Long flowering and attractive to bees. Hardy. Up to 60cm.

Euphorbia x martini 'Baby Charm' (Martin's spurge 'Baby Charm'): Compact form of Euphorbia x martini, very neat and tidy. Apple green flowers with red capsules. Hardy in free-draining soil. To 50cm.

Francoa sonchifolia (Bridal wreath): Spires of pale pink flowers over semi-evergreen, pinkish-green foliage.

Gaura lindheimeri 'Elurra': A more compact form with airy wands of white flowers. Best in full sun, in well drained soil and a sheltered spot. Up to 50cm.

Leucojum aestivum 'Gravetye Giant' (Summer snowflake): Rather like a tall, green-tipped snowdrop, but flowering in mid to late spring. Fully hardy. Height to 50cm. [Collect Only]

Origanum 'Rosenkuppel' (Oregano 'Rosenkuppel'): A lovely cultivar with scented foliage and erect stems with dark pink/purple flowers. Loved by bees and butterflies. Non-edible form. Hardy. Up to 60cm.

Paeonia officinalis 'Rubra Plena' (Peony 'Rubra Plena'): The classic deep red double paeony. Deeply divided leaves unfurl in spring. Max Height 90cm. Flowers April to May. Full sun/partial shade. [Collect Only]

Pulsatilla vulgaris 'Alba' (Pasque flower - white): Large cup shaped white flowers over soft ferny foliage. Thrives in sunny, well drained spots.