Calamagrostis x acutiflora 'Karl Foerster' (Feather-reed grass 'Karl Foerster'): Deciduous grass which forms upright clumps, flowering purplish in June/July, fading to gold then blond through winter. Hardy. Up to 1.8m. [Collect Only]

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

Cirsium rivulare 'Trevor's Blue Wonder' (Brook thistle 'Trevor's Blue Wonder'): Not blue at all, I'm afraid, but a more purplish hued form of the more familiar deepest pink Cirsium rivulare 'Atropurpureum'. Hardy. To 1.5m

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]

Nepeta parnassica (Catmint): Very tall catmint with stout stems up to 1.8m and aromatic blue flowers

Perovskia 'Filigran' (Russian Sage 'Filigran'): Silvery foliage & spikes of purple flowers in mid-summer. More upright than other cultivars. Lovely winter stem effect. Hardy. Up to 1.5m. [Collect Only]

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]

Stipa gigantea (Golden oats): Evergreen grass with tall stems and panicles of oat-like purple-green flowers which ripen to gold. Up to 2m.

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. [Collect Only]

Veronicastrum virginicum f. roseum 'Pink Glow' (Culver's Root 'Pink Glow'): Slender spikes of pale pink flowers above rising whorls of slender green leaves. To 1.5m. Hardy [Collect Only]