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Galium verum
A low, spreading annual with aromatic foliage and dense clusters of bright yellow flowers throughout summer.
Geranium nodosum 'Silverwood'
A spreading perennial with glossy green, palmate leaves producing attractive and dainty, cup-shaped white flowers in spring and summer.
Geranium phaeum 'Lily Lovell'
A clump-forming perennial with lobed, light green leaves and slender stems bearing deep purple flowers in late spring and early summer.
Geranium phaeum 'Robin's Angel Eyes'
Slender branching stems of small purple flowers with near white centres and a halo of purple veins in late spring and early summer.
Geranium ROZANNE ('Gerwat' PBR)
Large, saucer-shaped, violet-blue flowers throughout the summer and often well into autumn above wonderful, marbled rich green foliage. An incredibly floriferous variety voted as Plant of the Centenary as the 2013 RHS Chelsea Flower Show.
Geum 'Lady Stratheden' (d)
Bright yellow, semi-double flowers on arching stems from late spring to midsummer above rosettes of scalloped, green leaves.
Geum 'Mrs J. Bradshaw' (d)
A clump-forming perennial which is very fast-growing, forming a dense carpet of scalloped leaves with semi-double, vivid scarlet flowers throughout summer.
Hesperis matronalis
A delightful perennial with sweetly fragrant violet-purple flowers in spring and early summer.
Hesperis matronalis var. albiflora
A very attractive and fragrant perennial which produces clusters of upright branched stems bearing masses of white flowers during late spring and early summer.
Hosta 'Blue Mouse Ears'
A miniature hosta with mounds of blue-grey leaves producing lavender-coloured flowers in summer.
Iris 'Carnival Time' (TB)
One of the great garden irises! Ruffled standards of coppery brown, chestnut red centre falls edged amber. Sweetly scented. This iris is a really strong growing garden plant and should thrive in most gardens to give masses of colour each June.
Iris 'Ola Kala' (TB)
(Sass 1943). One of the very best and most enduring of historic irises. A very deep and rich yellow, the flowers have great form.
Iris 'Quechee' (TB)
Almost invariably seen at the Chelsea Flower Show, including Joe Swift's garden in 2012. Large shapely flowers of deep mahogany red. Free flowering, a group of this lovely plant pervades the air with the scent of orange chocolate...yummy! Height to around. 90cm.
Iris 'Sultan's Palace' (TB)
Rich chestnut brown self coloured flowers. The blooms have a beautiful velvety texture. Graceful, well formed flower great distinction. Free flowering with good foliage.
Iris 'Winter Olympics' (TB)
Completely white, simple, sublime elegant, and all those adjectives in one! Lovely and performs well in the border reaching around 85cm in height.
Iris pallida subsp. pallida
An anciently cultivated plant. Clear lavender flowers which are deliciously fragrant. The foliage is a noteable feature which always looks fresh and lustrous. An ideal garden plant, particularly so for a period garden. One of the earliest flowering taller cultivars.
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.
Liatris spicata 'Alba'
A clump-forming perennial with lance-shaped leaves and dense spikes of white flowers from summer into 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.
Liriope muscari 'Big Blue'
An evergreen perennial with strap-shaped, glossy, dark green leaves producing dense spikes of purple-blue flowers in late summer and autumn, followed by bright purple berries.
Luzula nivea
A slender, evergreen grass with hairy leaves, forming loose clumps, making a great ground cover plant throughout the year. In midsummer, it bears elegant clusters of small, white flowers which can self-seed freely, so to keep it in check, prompt deadheading is recommended.
Lysimachia CANDELA ('Innlyscand')
A compact and clump-forming perennial with broad, lance-shaped, dark-green leaves producing dense racemes of saucer-shaped, white 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 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.
Nepeta x faassenii 'Purrsian Blue'
A compact perennial, doubling its spread by its second year of growth. Greyish-green, toothed, aromatic leaves clothe the stems and densely-packed blue flowers with dark purple calyces are borne on upright spikes in summer and autumn.
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 'Tresco Purple'
A spreading, evergreen perennial with slightly toothed, green foliage, producing bright-purple, daisy-like flowers from early summer into autumn.
Penstemon 'Andenken an Friedrich Hahn'
Excellent, long-flowering perennial carrying tubular, wine-coloured flowers.
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.
Penstemon 'Sour Grapes'
A semi-evergreen perennial with lance-shaped leaves and bearing tubular purple-blue flowers over a long period in summer into autumn.
Penstemon 'Thorn'
An upright perennial to 75cm tall, with narrow leaves and loose panicles of tubular white flowers, tinged with deep pink.
Persicaria bistorta 'Superba'
Tall stems support dense heads of pale pink flowers that wave elegantly in the breeze creating wonderful, natural motion that brings the garden to life. Excellent ground cover for a damp location.
Persicaria microcephala 'Red Dragon' PBR
A vigorous, spreading, semi-evergreen perennial with attractive, purplish-green leaves and bearing rounded clusters of small, white flowers in summer and autumn.
Phormium 'Bronze Baby'
An upright to arching, evergreen perennial with strap-like, purple-bronze leaves and in hot summers, may produce an upright spike of tubular red flowers from the centre of the plant.
Phormium 'Evening Glow' (v)
A clump-forming, evergreen perennial with sword-like leaves of red, pink, purple and bronze variegations.
Phormium 'Jester' (v)
A clump-forming, evergreen perennial with arching, strap-like leaves of pink with bright green margins.
Phormium 'Pink Stripe' (v)
An elegant variety with dark olive-green strappy leaves with distinctive pink stripes.
Phormium colensoi 'Tricolor' (v)
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' (Pf)
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.
Primula veris (Pr)
A British native, this plant displays fragrant, deep yellow flowers in late spring on downy stems up to 20cm long.
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.