Actaea pachypoda (white baneberry): Grown mainly for its pure white berries in autumn, each with a black 'eye' on a red stalk. Hardy. Up to 1m. [Collect Only]

Agastache rugosa f.albiflora 'Liquorice White' (Korean mint 'Liquorice White'): Tall, aromatic perennial with spires of tiny white flowers. Aromatic foliage. To 1.5m. Fully hardy in light soils. May self-seed.

Althaea cannabina (Hemp leaved Hollyhock): Very tall, slender, wandy stems with shell pink flowers in late summer

Amsonia hubrichtii (Hubricht's bluestar): Clumps of soft feathery green foliage and palest blue star-like flowers in late Spring. Textural plant. Attractive autumn colour. Up to 60cm. Hardy

Armeria maritima 'Splendens' (Thrift 'Splendens'): Cushion-forming with linear dark green leaves, bright carmine pink flowerheads. Max Height 25cm. Flowers May to June. Full sun. Hardy.

Aruncus aethusifolius (Goat's beard): Lovely fresh ferny foliage which turn golden in the autumn. Spikes of creamy white flowers in early summer. Hardy. Up to 50cm.

Astrantia 'Superstar' Syn. Astrantia 'White Giant' (Masterwort. Syn. Astrantia 'White Giant'): A new variety of white Astrantia selected for its very large white flowers. Flowers are bigger once the plant is established. [Collect Only]

Baptisia 'Indigo Spires' (Indigo weed 'Indigo Spires'): Spikes of violet-blue pea-like flowers with a yellow edge above a mound of grey-green foliage. Long flowering. Hardy. Up to 1.2m [Collect Only]

Baptisia australis (Indigo weed): Spires of lipped indigo flowers over olive-green foliage. Flowering height 1.2m.

Bletilla striata alba (Hyacinth orchid white form): White orchid flowers on arching stems and sword-like leaves in late spring. Frost-hardy, so needs a sheltered spot. Up to 20cm.

Cichorium intybus f. album (Chicory- white form): White flowered form of wild chicory. Tall stems, flat white flowers in late summer. Needs a bit of support. Hardy. Up to 2m.

Cichorium intybus f. roseum (Chicory- pink form): Pink flowered form of wild chicory. Tall stems, flat pink flowers in late summer. Up to 2m. Hardy. [Collect Only]

Deschampsia cespitosa (Tufted hair grass): Summer flowering grass with airy silvery purple flower heads which keep their structure long into winter. Hardy. Up to 1.2m. [Collect Only]

Deschampsia cespitosa 'Goldtau' (Tufted hair grass 'Goldtau'): Early flowering grass, in flower by mid-July. Airy flower plumes which shimmer if catch the light. Shorter than many varieties. [Collect Only]

Dianthus carthusianorum (German pink): Tall stems ending in clusters of bright pink flowers above mounds of green, grassy foliage. Prefers sunshine. Hardy. Up to 50cm.

Dicentra 'King of Hearts': Bright rose pendent flowers held above blue-green ferny foliage. Likes a sheltered spot in dappled shade, not too dry. Hardy. Up to 25cm.

Digitalis x mertonensis (Strawberry foxglove): Large, dusky pink flowers on sturdy spikes in mid-summer. Hardy. To 90cm.

Dodecatheon meadia (Shooting stars, American cowslip): Bright pink flowers in spring, swept back to reveal a yellow 'nose'. Hardy, but best grown in a sheltered spot. Up to 20cm.

Echinacea 'Cleopatra' (PBR) (Coneflower 'Cleopatra'): Vibrant yellow daisy-flowers fading to pale yellow with large central orange cone. Long flowering and great for bees and butterflies. Hardy. Up to 45cm.

Echinacea 'Hope' (Coneflower 'Hope'): Pastel pink daisy-like flowers with large orange central cone. Large blooms. Attractive to bees and butterflies. [Collect Only]

Echinacea purpurea (Coneflower): Large rosy-purple daisy-like flowers with a large brown central cone. Very attractive to bees and butterflies. Long flowering season [Collect Only]

Echinacea purpurea 'Green Twister' (Coneflower 'Green Twister'): A new variety with a unusual mix of purple and lime green flowers with upturned petals and a central dark cone. Hardy. Up to 60cm.

Echinacea purpurea 'Magnus Superior' (Coneflower 'Magnus Superior'): Superb form with tall stems of pink daisy flowers with a central brown cone. Prefers full sun and good drainage. Hardy. Up to 1m.

Echinacea purpurea 'Rubinstern' (Coneflower 'Rubinstern'): Large pink flowers with a big golden central cone in late summer

Echinacea purpurea 'Virgin' (Coneflower 'Virgin'): A very good pure white form with central golden cone.

Eryngium agavifolium (Agave-leaved sea holly): A statement foliage plant with an agave-like rosette from which arises tall spikes with cone-like grey-green flowers. Loved by bees. Hardy. Up to 1.5m. [Collect Only]

Eryngium bourgatii 'Picos Amethyst'': Stunning steely blue flowers on stiff stems with a gorgeous purple tint.

Eryngium planum 'Blue Hobbit' (Sea Holly 'Blue Hobbit'): A more compact form with steely blue flowers on dark stems. Spiny glaucous foliage. Loves sunshine and very well-drained gritty soil. Hardy. Up to 30cm.

Eryngium x zabelii 'Big Blue (Sea Holly 'Big Blue): Large electric-blue thimble-shaped flowers with a spiky collar and silver-green foliage. Long flowering and bee-friendly. Hardy. Up to 75cm

Euphorbia characias subsp. wulfenii (Mediterranean spurge): Evergreen perennial with blue-green leaves and vibrant lime-green flowers in early summer. Prefers full sun. Hardy to about -10C, but not for long periods. Up to 1.2m.

Euphorbia mellifera (Honey spurge): A stately plant which makes a dramatic feature in sheltered spots. [Collect Only]

Euphorbia x martini 'Baby Charm' (Martin's spurge 'Baby Charm'): Compact form of Euphorbia x martini, very neat and tidy. Apple green flowers with red capsules. Hardy in free-draining soil. To 50cm.

Francoa sonchifolia (Bridal wreath): Spires of pale pink flowers over semi-evergreen, pinkish-green foliage.

Gaura lindheimeri 'Siskiyou Pink': A lovely airy perennial with long spikes of pink flowers. Long flowering. Best in full sun, in well drained soil and a sheltered spot.

Gaura lindheimeri 'Whirling Butterflies': Airy stems of white flowers from pink buds, flowering in midsummer. Best in full sun, in well drained soil and a sheltered spot. Up to 1m.

Gentiana asclepiadea (Willow gentian): Deep blue, trumpet-shaped flowers on tall, arching stems. Willow-like leaves Prefers some shade. Hardy. Up to 1m.

Geranium 'Ann Folkard' (Cranesbill 'Ann Folkhard'): Magenta flowers with black eye on long trailing stems. Yellowish green leaves. To 1.2m. Hardy

Geranium palmatum: Bright pink flowers held on wiry stems above rosettes of evergreen foliage. To 60cm. Frost hardy. [Collect Only]

Gillenia trifoliata (Bowman's root): Lovely plant with starry white flowers held high over elegant foliage. Great in light shade. Hardy. [Collect Only]

Gillenia trifoliata 'Pink Profusion' (Bowman's root 'Pink Profusion'): Lovely plant with starry palest pink flowers held high over elegant foliage. Great in light shade. Hardy. To 90cm.

Gypsophila paniculata 'Rosenschleier' (Pink baby's breath): Clouds of pale pink flowers over slender glaucous foliage. Excellent for flower arranging. [Collect Only]

Helleborus niger (Christmas Rose): Pure white flowers in midwinter, evergreen foliage.

Hepatica nobilis: Pretty bowl shaped blue flowers in early spring.

Heuchera 'Midnight Rose' (PBR): Darkest purple leaves, splashed with bright pink. Excellent for all year round foliage colour. Hardy. Up to 30cm.

Heuchera 'Obsidian' (PBR): Darkest purple leaves, almost black and glossy. Superb in pots - imagine it in a silver one!.

Heuchera 'Silver Scrolls': Maroon leaves heavily overlaid with silver.

Hosta 'Devon Green': Elegant hosta with tapering, dark green, fine-veined leaves. Lilac flowers in summer [Collect Only]

Lamprocapnos spectabilis 'Valentine' (Bleeding Heart, Dicentra): Superb warm red flowered version of this familiar spring flowerer. Hardy. Up to 80cm. [Collect Only]

Leucojum aestivum 'Gravetye Giant' (Summer snowflake): Rather like a tall, green-tipped snowdrop, but flowering in mid to late spring. Fully hardy. Height to 50cm.

Liatris spicata 'Alba': Spikes of white flowers in mid to late summer. Very useful vertical accent. Bees adore it. To 80cm. Hardy

Lupinus 'Chandelier' (Lupin 'Chandelier' (Band of Nobles Series)): Tightly packed spires of creamy yellow flowers in midsummer. Long flowering. Hardy. Up to 1m. [Collect Only]

Lupinus 'The Governor' (Lupin 'The Governor' (Band of Nobles Series)): Tightly packed spires of blue and white flowers in midsummer. Long flowering. Hardy. Up to 90cm. [Collect Only]

Lupinus 'The Page' (Lupin 'The Page' (Band of Nobles Series)): Tall spires of bright red flowers in midsummer. Cottage garden favourite. Hardy. Up to 1m. [Collect Only]

Lychnis coronaria Atrosanguinea Group (Rose campion (dark red)): Bright magenta flowers over felty, silver foliage. Great for sunny, dry areas can be short lived in a wet, cold winter. To 1.2m Hardy.

Paeonia 'Buckeye Belle' (Peony 'Buckeye Belle'): Blowsy, glossy, deep red, semi-double large flowers with golden stamens. Attractive green foliage. A real stand-out plant. [Collect Only]

Paeonia 'Flame' (Paeony 'Flame'): Rich and shiny scarlet red single flowers with a yellow centre. Glossy dark green leaves. Hardy. Up to 80cm. [Collect Only]

Paeonia lactiflora 'Bowl of Beauty' (Peony 'Bowl of Beauty'): Huge sugar-pink petal bowls filled with ripples of yellow ribbony bits. Swoon-worthy. [Collect Only]

Paeonia lactiflora 'Nymphe' (Peony 'Nymphe'): Strongly scented deep pink flowers with a golden centre. Attractive dark green foliage. Hardy. Up to 90cm. [Collect Only]

Paeonia lactiflora 'White Wings' (Peony 'White Wings'): Single, lightly fragrant white flowers with gold centre. Full sun or light shade, rich but open soil best. To 1m. Fully hardy. [Collect Only]

Paeonia tenuifolia (Fern leaf Paeony): Sumptuous single deep red flowers, feathery foliage. Stunning plant for a sunny, well-drained spot [Collect Only]

Paeonia wittmanniana: A delightful herbaceous peony with pale pink almost white bowl-shaped flowers with a yellow centre and attractive foliage. Hardy. Up to 1m. [Collect Only]

Penstemon 'Dark Towers' (PBR): Pink tubular flowers which contrast with the dark bronze foliage. Semi-evergreen in milder areas. Protect from hard frosts. To 90cm. [Collect Only]

Penstemon 'Pensham Plum Jerkum': Plum-purple tubular flowers with white throat markings. Semi-evergreen in milder areas. Protect from hard frosts. To 70cm.

Penstemon 'Schoenholzeri': Brilliant scarlet tubular flowers, slender leaves.

Primula elatior (Oxslip): Pale yellow, primrose colour flowers in clusters on gently arching stems.

Pulsatilla vulgaris 'Papageno' (Pasque flower 'Papageno'): The petals are deeply dissected, giving a frilled, double effect. Usually purple but can be pink, reddish or white. Hardy. To 30cm

Pulsatilla vulgaris 'Rote Glocke' (Pasque flower 'Red Clock'): Large dark red flowers with yellow stamens flowers over soft ferny foliage. Thrives in sunny, well drained spots. To 40cm. Hardy.

Pulsatilla vulgaris Heiler hybrids: Mixed colour range, purple, pink, red or white. Lovely ornamental seed heads. Prefers a well drained, sunny site. Hardy. Up to 30cm.

Salvia 'Amethyst Lips' (PBR) (Sage 'Amethyst Lips): Bicolour flowers in white and deep purple and delicious scented foliage. Half-hardy, copes with -5C in a sheltered spot. To 1m.

Salvia 'Hot Lips' (Sage 'Hot Lips'): Bicolour flowers in white and lipstick red and delicious scented foliage. Half-hardy, copes with -5C in a sheltered spot. To 1m.

Salvia greggii 'Emperor' (Autumn sage 'Emperor'): Masses of maroon-purple flowers and delicious scented foliage. Half-hardy, copes with -3 to -5C in a sheltered spot. To 60cm.

Salvia x jamensis 'Nachtvlinder' (Sage 'Nachtvlinder'): Regal purple flowers on upright stems throughout late summer into autumn.

Sisyrinchium californicum (Golden-eyed grass): Bright yellow star-shaped flowers and grass-like grey-green foliage. Good for scree beds and alpine troughs. Hardy. Up to 60cm.

Thalictrum 'Splendide' (Rue 'Splendide'): Superb Thalictrum with clouds of purple flowers open for a very long time in late summer. Hardy. Up to 1.5m [Collect Only]

Thalictrum delavayi (Chinese meadow rue): Dainty lilac-mauve flowers 2cm in width, with prominent creamy yellow stamens above fern-like bright green leaves. Hardy. Up to 1.5m. [Collect Only]

Thalictrum delavayi 'Hinkley' (Chinese meadow rue 'Hinkley'): Dainty lilac-mauve flowers, with prominent long yellow stamens above fern-like bright green leaves. Hardy. Up to 1.5m.

Thalictrum kiusianum: Choice, low growing plant for semi-shade. Attractive foliage and small palest pink fluffy flowers.

Tiarella 'Iron Butterfly' (PBR) (Foam flower 'Iron Butterfly'): Deeply cut green leaves with a purple-black centre. Long flowering spikes of pale-pink star-like flowers. Hardy. Up to 30cm.

Tiarella 'Pink Skyrocket' (PBR) (Foam flower 'Pink Skyrocket'): A vigorous variety with deeply divided, elegant foliage and dainty pink flower spikes. Very long flowering. To 30cm. Hardy

Tiarella 'Spring Symphony' (PBR) (Foam flower 'Spring Symphony'): Perennial with deeply divided foliage with dark blotch in centre. Long flowering with spikes of white star-shaped flowers. Hardy. To 30cm

Verbena bonariensis: Tall, airy but strong slender stems with flat heads of purple flowers in mid to late summer. To 1.8m. Frost-hardy.

Veronicastrum 'Red Arrows' (Culver's Root 'Red Arrows'): Reddish-pink flower spikes open to lilac, over rising whorls of pointed green leaves. To 1.4m. Hardy [Collect Only]