Aruncus 'Horatio' (Goat's beard 'Horatio'): A very elegant form of the familiar goat's beard, with fine sprays of creamy flowers in summer. To 1.2m.

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.

Calamagrostis x acutiflora 'Overdam' (Feather-reed grass 'Overdam'): Deciduous grass with upright clumps of narrow cream-striped leaves with stems of purplish flowers, which fade to blond through winter. Hardy. Up to 1.2m. [Collect Only]

Campanula lactiflora 'Prichards Variety' (Milky bellflower 'Prichards Variety'): Clusters of warm blue flowers on tall stems in mid-summer. To 1m. Hardy.

Chasmanthium latifolium (Spangle grass): Deciduous perennial grass, with arching stems of flattened spikes. Bronze tints in Autumn. Moist, well-drained soil. Hardy. Up to 1m.

Crocosmia 'Hellfire': A tall variety with vibrant red flowers with a darker red thoat above strappy green leaves. Hardy. To 1.2m.

Deschampsia cespitosa 'Goldschleier' (Tufted hair grass 'Goldschleier'): Summer flowering grass. Airy golden flower heads keep their structure long into winter. Hardy. Up to 1m.

Deschampsia cespitosa 'Schottland': Summer flowering grass with dark green leaves and airy silvery purple flower heads, keep their structure long into winter. Hardy. Up to 1.2m. [Collect Only]

Dierama 'Blackberry Bells' (Angel's Fishing Rod): Large bells of deep-purple maroon flowers held on tall, slender stems above grass-like foliage. Hardy. To 1.2m

Dierama pulcherrimum 'Blackbird' (Angel's Fishing Rod): Arching bells of burgundy red flowers nodding over grassy foliage.

Digitalis grandiflora (Yellow foxglove): Perennial foxglove with yellow bell-shaped flowers above clumps of evergreen lance-shaped leaves. Bee-friendly. Hardy. Up to 1m.

Echinops bannaticus 'Blue Globe' (Globe thistle): Tall upright stems of bright blue globe flowers above clumps of spiny, grey-green leaves. Bee-friendly. Hardy. Up to 1.2m.

Euphorbia mellifera (Honey spurge): A stately plant which makes a dramatic feature in sheltered spots.

Gaura lindheimeri 'The Bride': Beautiful airy stems of white flowers in mid to late summer. Best in full sun, in well drained soil and a sheltered spot. Stems up to 1m. [Collect Only]

Geranium psilostemon (Armenian cranesbill): Big magenta flowers with shiny black eye. Tall and vigorous. To 1.2m. Hardy.

Kniphofia 'Alcazar' (Red hot poker 'Alcazar'): Tall spikes of vibrant red-orange flowers opening to a paler yellow to give a two-tone effect. Strappy green foliage. Hardy. Up to 1.2m.

Leucanthemum x superbum 'Sonnenschein' (Shasta daisy 'Sonnenschein'): Shasta daisy with pale yellow flowers with golden centre. Excellent for cutting. Long flowering season. Hardy. Up to 90cm

Lychnis chalcedonica (Maltese cross): Domes of bright scarlet flowers with four petals, hence its common name. Excellent for adding height and bright colour in summer borders

Lychnis coronaria 'Alba' (Rose campion (white)): Pure white flowers on tall silver stems above rosettes of silver leaves

Lychnis coronaria Atrosanguinea Group (Rose campion (dark red)): Bright magenta flowers over felty, silver foliage. Great for sunny, dry areas can be short lived in a wet, cold winter. To 1.2m Hardy. [Collect Only]

Lythrum salicaria 'Blush' (Loosestrife 'Blush'): Tapering, sturdy spikes of soft pink flowers in mid to late summer. To 1.2m. Hardy [Collect Only]

Lythrum salicaria 'Feuerkerze' (Loosestrife 'Firecandle'): Tapering, sturdy spikes of bright pink flowers in mid to late summer. To 1.2m. Hardy

Lythrum salicaria 'Swirl' (Loosestrife 'Swirl'): Slender upright spires of bright pink flowers from early to late summer. Does well in damp borders but generally unfussy. Hardy. Up to 1m. [Collect Only]

Lythrum virgatum 'Dropmore Purple' (Wand loosestrife 'Dropmore Purple'): Upright spikes of purple-pink flowers in the mid-summer with lance-like foliage. Prefers a moist soil. Hardy. Up to 1m.

Phlox paniculata 'Blue Paradise' (Phlox 'Blue Paradise'): An attractive form with bright blue-purple heavily scented flowers. Good for cutting. Hardy. Up to 1.2m.

Phlox paniculata 'David' (Phlox 'David'): An excellent phlox with clean white flowers and a delightful scent. To 1.2m. Hardy.

Sanguisorba 'Burr Blanc': A lovely white Sanguisorba with fluffy flowers above ferny foliage. Very floriferous. Prefers soil that is not too dry. Hardy. Up to 1.2m

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