Actaea matsumurae 'White Pearl' (Baneberry 'White Pearl' (Previously known as Cimicifuga)): Ferny, light green foliage all summer, arching spires of scented white flowers in autumn. Great in some shade. Hardy. Up to 1.5m

Actaea simplex 'Brunette' (Baneberry 'Brunette' (Previously known as Cimicifuga)): Spires of scented white flowers in late summer over very attractive ferny dark foliage. A superb plant in part shade. Hardy. Up to 1.5m

Angelica gigas: Magnificent plant with huge domes of purple flowers in summer, and attractive seed heads. Biennial/short-lived perennial. Up to 2m.

Anthriscus sylvestris 'Ravenswing' (Purple cow parsley): A dark leaved form of the common cow parsley. To 1.5m. Hardy. Tends to be biennial.

Campanula lactiflora 'Loddon Anna' (Milky bellflower 'Loddon Anna'): Tall stems topped with clusters of palest pink flowers in mid-summer. Excellent for filling out a border and adding height. To 1.5m. Hardy.

Campanula lactiflora 'Prichards Variety' (Milky bellflower 'Prichards Variety'): Clusters of warm blue flowers on tall stems in mid-summer. To 1.5m. Hardy.

Centaurea macrocephala (Giant knapweed): Huge, bright yellow almost fluffy flowers in mid-summer follow attractive papery buds. Attractive to bees. Height to 1.5m. Hardy.

Cirsium rivulare 'Atropurpureum' (Brook thistle): Deep red thistle flowers held above typical thistley foliage. Very attractive to bees. Very good garden plant. To 1.2m. Hardy

Eupatorium maculatum 'Riesenschirm' (Joe Pye Weed 'Riesenschirm'): Even taller than the species and a dramatic plant with huge heads of purplish pink flowers in late summer. Hardy. To 2.5m.

Eupatorium maculatum Atropurpureum Group (Joe Pye-weed): Tall, dramatic plant with domes of purplish pink flowers in late summer. Very attractive to bees. Hardy. To 2m. [Collect Only]

Filipendula rubra 'Venusta' (Meadowsweet 'Venusta'): Cultivated form of Meadowsweet with large heads of deep pink flowers like candyfloss.Tall plant up to 2.5m. Prefers moist but well-drained soil

Fuchsia 'Riccartonii': Frost-hardy but prefers a sheltered spot. Deciduous shrub with small single, scarlet and purple flowers. Long-flowering. Up to 2.5m. [Collect Only]

Helianthus salicifolius (Willow-leaved sunflower): Tall, mobile stems with fine, willow-like leaves - makes a fine foliage feature. Yellow flowers in autumn

Leucanthemum x superbum 'Wirral Supreme': Tall form of Shasta daisy with white flowers and multiple shorter petals around the golden centre, making an attractive frilly effect. Hardy. Up to 1.5m.

Ligularia przewalskii: Elegant spikes of golden yellow flowers on black stems above very deeply divided green foliage.

Miscanthus sinensis 'Flamingo': Clumps of narrow arching leaves and tall stems of dark pink plume-like flowers in summer. Fading to silvery grey in winter. Hardy. Up to 1.8m. [Collect Only]

Miscanthus sinensis 'Silberfeder': Reliable flowering grass with tall, upright silvery flowers in late summer. Arching dark green foliage. Height to 2m. Hardy. [Collect Only]

Miscanthus sinensis 'Undine': Clumps of narrow arching leaves and tall stems of plume-like flowers in summer. Fading to an oaty yellow colour in the winter. Hardy. Up to 2m. [Collect Only]

Molinia caerulea 'Heidebraut' (Purple moor grass 'Heidebraut'): Elegant flower stalks with slender purple flower heads in late summer. Makes an upright, vase shape. To 1.2m. Hardy

Molinia caerulea 'Poul Petersen' (Purple moor grass 'Poul Petersen'): Very handsome grass, much beloved by modern garden designers. Makes an upright, vase shape of burnished gold in autumn.

Panicum virgatum 'Heavy Metal' (Switch grass 'Heavy Metal'): Deciduous clump-forming grass with strappy blue-green leaves which turn a to purple/red, with clouds of airy flowers flushed purple. Hardy. Up to 1.5m

Rheum palmatum 'Atrosanguineum' (Ornamental rhubarb 'Atrosanguineum'): Very large, deeply dissected green leaves with plum-coloured undersides. Sprays of rich pink flowers in summer. [Collect Only]

Rudbeckia laciniata 'Herbstsonne': Very tall form adding impact to borders. Dark stems with vibrant yellow flowers with a green central cone. Hardy. Up to 2m.

Salvia uliginosa (Bog Sage): Branched stems of clear blue flowers and lance-shaped leaves. Needs a sunny spot but with moist soil. Hardy. Up to 2m. AGM.

Sanguisorba 'Cangshan Cranberry' (Burnet 'Cangshan Cranberry'): Very tall reddish stems of burgundy-red bobbly flowers in late summer over blue-green leaves. Prefers moist soil. Hardy. Up to 2m.

Sanguisorba officinalis 'Crimson Queen': Tall form of Sanguisorba with airy stems and deep red-pink bobble-like flowers. Hardy. Up to 1.4m [Collect Only]

Selinum wallichianum (Wallich milk parsley): Stately umbellifer with large white heads atop large lacy leaves. Hardy. To 1.5m

Thalictrum 'Elin' (Rue 'Elin'): Tallest of the Thalictrums we grow with huge heads of lavender and yellow flowers in mid-late summer. To 2m. Hardy.

Thalictrum aquilegiifolium (French meadow rue): Fluffy heads of pale pink or white flowers in early summer

Thalictrum aquilegiifolium 'Album' (French meadow rue 'Album'): Clouds of fluffy white flowers in spring, foliage looks like an aquilegia, but much taller. To 1.5m Hardy

Thalictrum rochebruneanum (Meadow rue): Airy sprays of lavender flowers with yellow stamens on tall purple-tinged stems. To 1.4m. Hardy

Valeriana officinalis (Common valerian): Tall perennial with branched stems of tiny, soft white/pale pink flowers in early summer. Ferny, foliage. Hardy. Up to 1.2m. [Collect Only]

Veronicastrum virginicum 'Album' (Culver's Root 'Album'): Slender spikes of white flowers above rising whorls of slender green leaves. To 1.5m. Hardy