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Acaena buchananii
Mats of pale grey-green leaves and round heads of flowers.
Acaena magellanica
One of the very few flowering plants from South Georgia. Rusty brown burrs.
Acaena microphylla 'Kupferteppich'
A low-growing mat of fine bronze leaves with small yellow flowers and red burrs.
Acaena ovalifolia
Trailing alpine with small flowers followed by burrs of seedheads.
Acaena saccaticupula
Blue-grey foliage contrasts with short-stemmed red/bronze flowers and burrs.
Acantholimon cabulica
Rosette of light grey marbled leaves; for a sand plunge in cold greenhouse.
Achillea 'Terracotta'
Large flat heads of burnt orange flowers over feathery leaves.
Achillea 'Walter Funcke'
Orange-red flowers over silver-green foliage.
Aciphylla aurea
Very sharply pointed leaves producing a dramatic spike of tiny flowers.
Aconitum anthora
usually pale yellow flowers monkshood flowers and deeply cut blue-green foliage.
Aconitum carmichaelii Arendsii Group
Spikes of large, blue, hooded flowers in summer; attractive glossy green leaves.
Aconitum lycoctonum subsp. vulparia
Monkshood with long spikes of pale creamy yellow flowers.
Aconitum napellus 'Rubellum'
Monkshood with spikes of red hooded flowers.
Aconitum napellus subsp. vulgare
A monkshood with compact spikes of violet to deep blue flowers.
Aconitum piepunense
Rare tall perennial with loose spires of light blue hooded flowers.
Aconitum x cammarum 'Bicolor'
Dense clusters of rich blue-and-white monkshood flowers.
Actaea simplex 'Brunette'
Tall bottlebrush heads of pinkish white flowers above dark divided leaves.
Actaea simplex 'Pink Spike'
Dramatic perennial with spikes of ponk flowers, pale then darkening.
Adenophora liliifolia
Leafy stems with drooping bell-shaped blue flowers, lightly scented.
Adenophora tashiroi
Herbaceous campanula relative with spikes of purple flowers.
Adenophora triphylla
Erect stems with whorls of tubular blue flowers.
Aegopodium podagraria 'Variegatuma'
variegated ground elder, with splashes of creamy white on deep green leaves
Aethionema grandiflorum
Woody sub-shrub with racemes of pink flowers.
Agapanthus africanus 'Albus'
Clump-forming perennial with umbels of bell-shaped white flowers.
Agapanthus 'Lilliput'
Compact clump of slender leaves with small umbels of dark blue flowers.
Agapanthus 'Midnight Blue'
prolific heads of deep violet-blue flowers, and deeper blue mid-ribs.
Agapanthus praecox
Strap-like leaves and rich, dramatic blue flowers
Agapanthus 'Silver Moon'
Large heads of blue flowers and leaves with strong white strips on each side.
Agapanthus 'Torbay'
prolific heads of spherical mid sky-blue flowers, and deeper blue mid-ribs.
Agapanthus 'Underway'
Attractive, deciduous, clump-forming plant with soft pale blue flowers.
Ajuga pyramidalis 'Metallica Crispa'
Slightly metallic dark purple leaves below small blue flowers.
Ajuga reptans
Low mats of bronze foliage with spikes of blue flowers.
Ajuga reptans 'Valfredda'
Tiny mounds of narrow, chocolate-coloured leaves; spikes of dark blue flowers.
Allium cristophii
Huge spherical heads of pink flowers on short stems.
Allium hollandicum 'Purple Sensation'
Onion with dramatic heads of purple flowers.
Alnus maximowiczii
Alder tree from Japan with showy green-yellow catkins in spring
Anacyclus pyrethrum var. depressus
Mat of highly dissected leaves, large daisies with red buds.
Andromeda polifolia 'Alisa'
Low ericaceous shrublet with many small, bright pink, goblet-shaped flowers.
Andromeda polifolia 'Grandiflora'
Large clusters of pale pink flowers growing from glaucous green foliage.
Androsace lanuginosa
Pale pink flowers with greeny yellow eyes in compact umbels.
Androsace selago
Androsace strigillosa
Loose heads of white flowers with gorgeous dusky pink under the petals.
Androsace studiosorum
Low mat of rosettes with bright pink flowers with a yellow eye.
Anemone barbulata
Clusters of numerous blue-backed, pure white flowers.
Anemone blanda blue-flowered
Woodland ground cover; range of blues, including pale blue.
Anemone blanda 'White Splendour'
Woodland ground cover; large white flowers.
Anemone caroliniana
Glossy, deeply divided leaves and creamy white cupped flowers.
Anemone cf. rivularis
White flowers with blue/purple flushed buds.
Anemone coronaria 'The Admiral'
Large semi-double violet flowers.
Anemone leveillei
Waxy, white flowers flushed lilac on the back.
Anemone lyallii
The western wood anemone, with pale blue, pink or white flowers.
Anemone multifida
Hairy, multiply divided leaves and creamy yellow flowers.
Anemone multifida Annabella Series
Upright stems with several deep rose pink flowers above multiply divided leaves.
Anemone multifida 'Rubra'
A less common form, with crimson red flowers.
Anemone multifida var. globosa
Hairy, multiply divided leaves and cup-shaped rich pink-red flowers.
Anemone nemorosa
The wood anemone, with starry, pink-flushed white flowers.
Anemone nemorosa 'Bracteata Pleniflora'
White flowers tipped with green, with a ruff of green bracts.
Anemone nemorosa 'Robinsoniana'
Wood anemone form with pale sky blue flowers.
Anemone nemorosa 'Vestal'
Beautiful wood anemone with double white flowers.
Anemone nemorosa 'Viridescens'
A wood anemone with unusual green, white-centred 'flowers'.
Anemone parviflora
Short erect stems with large, solitary white flowers; from sub-arctic regions.
Anemone ranunculoides 'Pleniflora'
Wood anemone with double yellow flowers.
Anemone ranunculoides subsp. ranunculoides
Deep yellow flowers over attractive dissected foliage.
Anemone reflexa
One to three white flowers with reflexed petals per stem.
Anemone rivularis
Lovely white flowers, steely blue-grey on the back (and in bud).
Anemone x hybrida 'Honorine Jobert'
Pure white flower above deeply cut leaves.
Anemone x hybrida 'Queen Charlotte'
Herbaceous perennial with many large, semi-double pink flowers.
Anemone x hybrida 'September Charm'
Many heads of pink cup shaped flowers.
Anemone x hybrida 'Whirlwind'
Semi -double white flowers with yellow centres on tall stems.
Anemone x lesseri
Anemone with deeply divided leaves and bright red flowers.
Anemone x lipsiensis 'Pallida'
Pale yellow hybrid between white A. nemorosa and yellow A. ranunculoides.
Angelica archangelica
Architectural plant with large rounded umbels of greenish yellow flowers
Antennaria rosea
Mat of fine grey leaves with spikes of pink flowers.
Anthericum liliago
St. Bernard's lily; stems of starry white flowers.
Anthericum ramosum
White, starry flowers; petals curve back when fully open.
Anthyllis vulneraria var. coccinea
Variety of kidney vetch with bright red flowers.
Aquilegia bertolonii
Dwarf species with purplish blue spurred flowers.
Aquilegia buergeriana
Compact clump of foliage with maroon and yellow flowers on slender stems.
Aquilegia canadensis
Red flowers with yellow centres.
Aquilegia chaplinei
Rich yellow, long-spurred flowers, like a smaller version of A. chrysantha.
Aquilegia chrysantha
Showy, long-spurred yellow flowers.
Aquilegia coerulea
Blue sepals, long-spurred, and white petals; from the Rocky Mountains.
Aquilegia elegantula
Red flowers with yellow centres.
Aquilegia flabellata var. pumila
Blue flowers with white centres; dwarf.
Aquilegia flabellata var. pumila f. alba
White-flowered form of this dwarf species.
Aquilegia flavescens
A yellow columbine from the mountain meadows of the Rockies.
Aquilegia formosa
Fabulous flowers of orange, red and yellow; a striking addition to the border.
Aquilegia fragrans
Scented creamy white flowers.
Aquilegia jonesii x saximontana
Dwarf, with white-centred blue flowers above grey-green leaves.
Aquilegia karelinii
Abundant, deep violet flowers with neat foliage.
Aquilegia kuhistanica
Dwarf form of Aquilegia vulgaris with inky-blue flowers.
Aquilegia oxysepala var. kansuensis
Lovely burgundy flowers with yellow cups and curved spurs.
Aquilegia 'Red Hobbit'
Bushy, dwarf variety with brilliant cream and crimson flowers.
Aquilegia rockii
Elegant, dusky purple flowers on slender branched stems.
Aquilegia saximontana
Flower colours vary from light blue to violet to cream; blue-green leaves.
Aquilegia sibirica
Large, lilac-blue flowers above the foliage in spring.
Aquilegia yabeana
Long-spurred flowers of the deepest ink blue.
Arenaria festucoides
Pretty white flowers over dense hummocks of narrow foliage.
Armeria maritima 'Düsseldorfer Stolz'
Selected variety of 'sea pink' with very deep pink flowers.
Armeria maritima 'Morning Star'
'Sea pink', with white button flowers over grassy foliage.
Armeria maritima subsp. andina
A form of 'sea pink', with pink button flowers over grassy foliage.
Armeria tweedyi
NEW
Thrift with mounds of blue-green grassy leaves, and heads of rose-pink flowers
Arrhenatherum elatius var. bulbosum `Variegatum`
Bulbous oat grass; stripy leaves with attractive seed heads.
Artemisia stelleriana
Soft silver-grey foliage plant.
Aruncus aethusifolius
Feathery panicles of creamy white flowers; yellow autumn foliage.
Aruncus dioicus
Goatsbeard; feathery cream heads above attractive green serrated foliage.
Aruncus 'Guinea Fowl'
Feathery panicles of white flowers; yellow autumn foliage.
Asarum caudatum
Low evergreen woodlander with rusty brown flowers hiding under the leaves.
Asarum europaeum
An evergreen, creeping plant that has exotic hooded purple-red flowers.
Aster alpinus
Daisy flowers with lavender ray florets.
Aster likiangensis
White ray flowers, but with few rays per head.
Aster stracheyi
Creeping variety with pale lilac flowers.
Aster tongolensis
Large purple daisies with yellow centres on upright stems.
Aster x frikartii 'Mönch'
Sprays of lavender-blue daisy flowers in late summer; attractive foliage.
Astilbe japonica hybrid pink form
Tall spikes of pink feathery flowers above delicate cut leaves.
Astilbe 'Willie Buchanan'
Dwarf variety with very pale pink feathery flowers and tufted bronze foliage.
Astilbe x arendsii 'Brautschleier'
Clump-forming perennial with elegant sprays of of nodding white flowers.
Astilbe x arendsii 'Bressingham Beauty'
Tall hybrid with spreading bronze flushed leaves and bright pink flowers.
Astilboides tabularis
Tall panicles of small, creamy flowers.
Astrantia bavarica
Ruff of green and white bracts around pale pink flowers.
Astrantia major 'Alba'
Masterwort with white flowers tipped with green.
Astrantia major 'Claret'
Deep, ruby-red flowers with a ruff of long bracts.
Astrantia major 'Gill Richardson Group'
A lovely masterwort with large dark red flowers.
Astrantia major 'Rubra'
Dark red-pink flowers with a ruff of long bracts.
Astrantia 'Roma'
Clump-forming perennial with umbels of small, pink, papery flowers.
Aubrieta pinardii
Spreading mat with lots of pinky purple flowers.
Azorella trifurcata
A low, evergreen perennial, with lime-yellow flowers.
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