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Iris foetidissima
An evergreen perennial with rich green, glossy leaves bearing dull purple flowers flushed yellow in summer. The native Gladwyn iris. Mainly grown for its brilliant scarlet orange seed pods which can last all winter. The smell of its crushed foliage has been likened to that of roast beef! Thrives in any soil including pure chalk and in deep shade.
Knautia macedonica 'Red Knight'
An upright perennial with branching stems of lobed foliage and masses of long-lastig red, pincushion-like flowers in summer.
Liatris spicata
An upright, clump-forming perennial with dark green, lance-shaped leaves producing erect stems of purple-pink flowers in summer and early autumn.
Ligusticum scoticum
A compact, clump-forming upright perennial with thick, glossy green leaves bearing umbels of tiny white flowers from June to August followed by golden seed heads. It is predominantly found in Northern Europe and the far North of Britain.
Lysimachia 'Candela'
A compact and clump-forming perennial with broad, lance-shaped, dark-green leaves producing dense racemes of saucer-shaped, white flowers in summer.
Macleaya microcarpa 'Kelways Coral Plume'
A spreading, herbaceous perennial with large, rounded, grey-green leaves and bearing tiny blush-pink flowers in airy panicles in summer.
Melissa officinalis
Lemon Balm. A bushy perennial with lemon-scented, oval green leaves with scalloped edges, producing spikes of creamy-white of pale purple flowers in summer.
Nepeta 'Six Hills Giant'
Spikes of lavender blue flowers throughout the summer above silvery aromatic leaves, makes this an attractive and robust catmint for the garden.
Nepeta cataria
A deciduous perennial with aromatic, greyish-green leaves with toothed margins, producing small white flowers spotted with violet in summer and autumn.
Nepeta grandiflora 'Summer Magic'
A compact, upright perennial with strongly aromatic grey-green foliage producing dense clusters of tubular violet-blue flowers throughout summer and into autumn.
This plant may be received cut back but it will soon begin to put on new growth.
Nepeta racemosa 'Walker's Low'
A great form of catmint with aromatic, grey-green foliage and bearing clusters of blue flowers in summer which if cut back after flowering, will often reflower later.
Omphalodes verna 'Alba'
A strong-growing, semi-evergreen perennial forming a mat of heart-shaped, bright green, slightly hairy leaves with racemes of white flowers in spring.
Origanum vulgare 'Aureum'
A woody perennial with aromatic, bright glden-yellow foliage producing light pink tubular flowers in summer and autumn.
Origanum vulgare 'Compactum'
A bushy, woody-based perennial with aromatic green leaves producing loose sprays of tiny, pale pink flowers from summer into early autumn.
Osteospermum jucundum
A rhizomatous perennial with narrow, aromatic, grey-green leaves, producing pale pinkish-purple flowers in summer with dark centres. A very attractive plant for a sunny, preferably sheltered position in the border.
Oxalis adenophylla
A bulbous perennial forming a clump of unusual greyish-green leaves producing solitary, bright rosy-pink flowers in late spring.
Peltoboykinia watanabei
A clump-forming perennial with deeply-cut, toothed, glossy green leaves which are flushed red when young and producing clusters of small, bell-shaped, pale yellow to yellow-green flowers on upright stems in summer.
Penstemon 'Pensham Just Jayne' (Pensham Series)
Vivid cerise-purple flowers over a long period in summer and early autumn.
Penstemon 'Pensham Plum Jerkum' (Pensham Series)
A bushy, semi-evergreen perennial with green, lance-shaped leaves, producing racemes of small, tubular, purple flowers in summer and early autumn.
Penstemon 'Rich Ruby'
A tall, semi-evergreen perennial with narrow leaves, producing deep red, bell-shaped flowers from midsummer into autumn.
Persicaria microcephala 'Red Dragon'
A vigorous, spreading, semi-evergreen perennial with attractive, purplish-green leaves and bearing rounded clusters of small, white flowers in summer and autumn.
Phlomis russeliana
A vigorous, spreading perennial with dramatic, grey-green, heart-shaped leaves and bearing pale yellow, hooded flowers from May right through until September.
Phormium 'Yellow Wave'
A clump-forming, evergreen perennial with arching, strap-like leaves of golden yellow margined green.
Phormium cookianum subsp. hookeri 'Tricolor'
A clump-forming, evergreen perennial with arching, sword-like leaves, striped green and creamy-yellow with a thin red margin.
Polemonium caeruleum
A lovely cottage garden favourite with bright green foliage from which emerge erect stems bearing lavender-blue flowers in midsummer. A short-lived perennial but it self-seeds freely.
Polemonium pauciflorum 'Sulphur Trumpets'
An unusual variety with drooping, trumpet-shaped yellow flowers tinged red in late spring and summer.
Primula japonica 'Alba'
A semi-evergreen perennial forming a basal rosette of crinkled, light green leaves with stout stems in late spring and summer topped with whorls of white flowers with yellow centres.
Rudbeckia fulgida var. deamii
A clump-forming, herbaceous perennial with rough, dark green leaves and bearing golden yellow flowers with black centres from summer and into autumn.
Rudbeckia fulgida var. sullivantii 'Goldsturm'
A clump-forming herbaceous perennial with tall stems bearing golden yellow flowers with black centres in summer and into autumn.
Rudbeckia triloba 'Prairie Glow'
A tall perennial with bristly green foliage producing daisy-like, orange-red flowers tipped yellow in summer and into autumn.
Salvia 'Amethyst Lips'
A sub-shrub with aromatic, evergreen leaves, producing whorled spikes of purple and white flowers in summer and early autumn.
Salvia 'Amistad'
A tall, upright perennial with bright green, slender, aromatic leaves producing masses of large, deep purple, tubular flowers from summer into autumn.
This plant may be received cut back but it will soon begin to put on new growth.
Salvia 'Blue Note'
A bushy, woody perennial with aromatic green leaves, producing open racemes of hooded, velvety, deep blue-purple flowers in summer.
Salvia 'Hot Lips'
A bushy perennial with aromatic foliage producing stunning bright lipstick-red and white flowers throughout the summer and into autumn.
Salvia 'Nachtvlinder'
An evergreen sub-shrub with aromatic leaves and producing open racemes of velvety reddish-purple flowers in summer and into autumn.
Salvia 'Royal Bumble'
A lovely variety with bright cherry red flowers on purple-flushed stems in late summer. Best grown in plenty of light but with shelter from the hot sun.
Salvia 'Violin Music'
A bushy perennial with aromatic leaves, producing slender racemes of small, violet-blue flowers from summer into autumn.
Salvia nemorosa 'Caradonna Pink Inspiration'
Slender, upright racemes of whorled, pink flowers in summer above, aromatic, wrinkled, dark grey-green foliage.
Salvia nemorosa 'Caradonna'
A wonderful cultivar of ornamental sage with erect stems bearing masses of small, violet-blue flowers throughout summer and into autumn.
Salvia nemorosa 'Rose Queen'
Clusters of deep pink buds opening to pale pink flowers in upright spikes in summer with aromatic foliage.
Salvia uliginosa
A very tall, robust, herbaceous perennial with sticky, lance-shaped leaves and bearing spikes of blue flowers from summer into autumn.
Salvia x jamensis 'Violette de Loire'
An upright, semi-evergreen perennial with aromatic foliage producing reddish-purple to deep magenta flowers in summer and early autumn.
Sanguisorba 'Purple Tails'
A vigorous, clump-forming deciduous herbaceous perennial with dark green toothed leaves, and upright long, slim spikes of pink, fluffy, droopy bottlebrush flowers, opening from purple buds, which appear from mid-summer to autumn
Silene dioica
A mat-forming, semi-evergreen perennial often found growing wild, with ovate leaves and small clusters of purplish-pink flowers from summer into autumn.
Sisyrinchium striatum
Tufts of long, narrow leaves support slender upright spikes of yellow flowers in summer. Self-seeds freely.
Stachys byzantina 'Big Ears'
A mat-forming perennial with velvety, white-hairy green leaves producing spikes of purple flowers in summer.