Alchemilla mollis (Lady's mantle): Bright green soft leaves and a froth of acid yellow/green flowers in summer. Very easy for ground cover

Anemone sylvestris (Snowdrop anemone): Large pure white flowers over a mound of green ferny foliage.

Anemone x hybrida 'Honorine Jobert' (Japanese Anemone 'Honorine Jobert'): Large white flowers flowering from late summer to autumn.

Anemone x hybrida 'September Charm' (Japanese Anemone or Wind Flower): Two-tone dark rose and shell pink flowers on tall stems in late summer.

Anthriscus sylvestris 'Ravenswing' (Purple cow parsley): A dark leaved form of the common cow parsley

Aubrieta 'Blue Cascade' (Aubrieta): A carpet of blue-purple flowers in spring. Great for smothering walls and gravel areas

Campanula lactiflora 'Loddon Anna' (Milky bellflower): Tall stems topped with palest pink flowers in mid-summer.

Campanula lactiflora 'Prichards Variety' (Milky bellflower): Clusters of warm blue flowers on tall stems in mid-summer.

Campanula persicifolia (Peach-leaved bellflower): Tall spikes of large, cup-shaped blue flowers over slender foliage in mid-summer.

Campanula persicifolia var. alba (Peach-leaved bellflower): Pure white large rounded cups on upright stems

Campanula portenschlagiana 'Resholt Variety' (Resholt's bellflower): Carpeting alpine with brilliant blue flowers over a long flowering period in summer.

Campanula takesimana 'Elizabeth' (Korean Bellflower): Upright stems with dark pink drooping large bells. Can be vigorous on good soil. May need some support. Bee-friendly. Hardy. Up to 70cm.

Cardamine quinquefolia: Light purple flowers emerge very early in spring, with attractive deeply divided leaves. Foliage dies down in summer.

Cenolophium denudatum (Seseli libanotis, Baltic parsley): Flat umbels of pretty white flowers in summer. Fine, filigree foliage

Centaurea dealbata (Persian cornflower): Large, showy pink flowers over deeply divided foliage. Makes a good-sized clump in a couple of years [Collect Only]

Centaurea macrocephala (Giant knapweed): Huge, bright yellow almost fluffy flowers in mid-summer.

Centaurea montana (Perennial cornflower): Large blue flowers in early summer, repeated later in year if cut back. Very attractive to bees.

Centranthus ruber 'Albus' (White 'Valerian'): White panicles of white flowers in mid-late summer. Very easy, self-seeds.

Centranthus ruber 'Coccineus' (Valerian): Panicles of dark-red flowers in mid-summer, loved especially by butterflies. Classic cottage garden plant. Hardy. Up to 50cm.

Cephalaria gigantea (Giant scabious): Very tall wavy stems topped with large lemon yellow scabious-like flowerss [Collect Only]

Convallaria majalis (Lily of the Valley): Scented white bells in spring, Great for spreading around in shade. [Collect Only]

Convallaria majalis 'Bordeaux' (Lily of the Valley): Double the height and more flower stems than the usual variety. Deliciously scented white flowers in spring. Hardy. Up to 30cm

Convallaria majalis 'Hardwick Hall' (Lily of the Valley): A form of lily of the valley with green leaves edged in yellow. Deliciously scented white flowers in spring. Hardy. Up to 25cm

Crocosmia 'Orange Pekoe' (PBR): Vibrant orange trumpet shaped flowers in late summer with sword shaped green foliage. A compact variety. Hardy. Up to 70cm. [Collect Only]

Cynara cardunculus (Cardoon): Dramatic, tall silver leaved plant topped with large purple thistle flowers in mid-summer.

Darmera peltata (Umbrella plant): Arching sprays of pretty pink flowers in early spring above large ornamental leaves. [Collect Only]

Darmera peltata 'Nana' (Umbrella plant 'Nana'): A compact form with rounded glossy leaves and pale pink flowers which appear before the leaves in the spring. Hardy. Up to 50cm. [Collect Only]

Delosperma 'Hybrid Mix' (Hardy Ice Plant, Jewel of the Desert): Brightly coloured, open flowers, small fleshy leaves.

Doronicum orientale (Leopard's bane): Bright yellow daisy flowers above fresh green foliage. A good early flower for the bees. Prefers partial shade. Hardy. Up to 60cm.

Epilobium angustifolium 'Stahl Rose' (Rosebay Willowherb.): Slender spires of pale pink flowers in late summer. Spreads rapidly through underground runners. To 1m. Hardy.

Erigeron karvinskianus (Fleabane): That pretty little daisy you see growing in the cracks in paving and walls in late summer....

Euphorbia amygdaloides var. robbiae (Mrs Robb's bonnet): Great plant for difficult dry, shady areas. Evergreen dark-green leaves and vibrant lime-green flowers in spring. Suckers and can spread.

Euphorbia griffithii 'Fireglow' (Spurge): Bright orange/red flower bracts in early summer. Vibrant red late summer foliage. [Collect Only]

Fragaria x ananassa 'Pink Panda' (PBR) (Pink flowered strawberry): Exactly like a small strawberry plant, except that the flowers are pink. Very attractive ground cover, berries are edible [Collect Only]

Fragaria x ananassa 'Red Ruby' (PBR) (Deep pink flowered strawberry): An ornamental strawberry plant with dark pink flowers from spring to autumn. Good ground cover [Collect Only]

Geranium 'Bob's Blunder' (Cranesbill 'Bob's Blunder'): Bright pink, small flowers over a spreading mat of soft, bronzy flowers.

Geranium himalayense 'Derrick Cook' (Cranesbill 'Derrick Cook'): Large white flowers with delicate purple veining above a clump of bright green leaves. Foliage turns red in autumn. To 35cm. Hardy.

Geranium macrorrhizum 'Album': Superb ground cover Geranium especially for dry shade. White flowers with definite hint of pink. Aromatic foliage.

Geranium macrorrhizum 'Bevan's Variety': Superb ground cover Geranium especially for dry shade. Bright pink over a dense mound of aromatic foliage.

Geranium maculatum 'Album': Clean white flowers over neat foliage. Great for establishing under trees and in shady areas.

Geranium nodosum 'Silverwood': Pure white form of the more common pink species.

Geranium phaeum (Mourning widow Geranium): Purple flowers with swept-back petals held high above soft green foliage. Early to flower, reliable and easy.

Geranium phaeum pale purple (Mourning widow Geranium): Pale purple flowers with swept-back petals held high above soft green foliage. Early to flower, reliable and easy. [Collect Only]

Inula hookeri: Bold heads of golden yellow flowers with hundreds of long petals. A good border filler.

Lamium maculatum 'White Nancy' (Spotted dead nettle 'White Nancy'): A low ground cover plant with silvery heart-shaped leaves and short stems of white. Brightens up a shady area. Hardy. Up to 20cm.

Leptinella squalida (Brass Buttons): Low-growing perennial with attractive feathery, bright green, fern-like foliage. Flowers are small, button-like in summer. Hardy. Up to 10cm.

Leptinella squalida 'Platt's Black' (Brass Buttons): Low-growing perennial with attractive feathery, bronzy-black foliage with green tips. Flowers are small, button-like. Hardy. Up to 10cm.

Ligularia 'The Rocket': Dramatic spikes of yellow flowers on black stems over very large green toothed leaves [Collect Only]

Ligularia przewalskii: Elegant spikes of golden yellow flowers on black stems above very deeply divided green foliage. [Collect Only]

Lysimachia barystachys (White Loosestrife): Upright spikes of white flowers in late summer. Vigorous and very attractive to bees and butterflies. [Collect Only]

Maianthemum bifolium (False lily of the valley): Shade-loving spreading perennial. Pairs of glossy oval leaves. Like a mini-hosta. Spikes of white star-shaped flowers. [Collect Only]

Monarda 'Cranberry Lace' (PBR) (Bee Balm/Bergamot): A more compact variety with whorls of bright pink flowers over bright green aromatic foliage. Bee-friendly. Hardy. Up to 40cm. [Collect Only]

Monarda 'Gardenview Scarlet' (Bee Balm/Bergamot): Whorls of bright red flowers held above aromatic foliage.

Monarda 'Jacob Cline' (PBR) (Bee Balm/Bergamot): Whorls of the brightest imaginable red flowers over bright green aromatic foliage

Monarda 'Pink Supreme' (PBR) (Bee Balm/Bergamot): Whorls of bright pink flowers over bright green aromatic foliage. Compact variety. Prefers a moist soil. Hardy. Up to 60cm.

Monarda 'Saxon Purple' (Bee Balm/Bergamot): Whorls of deep purple flowers over bright green aromatic foliage. Good mildew resistance. Bee-friendly. Hardy. Up to 90cm

Nepeta 'Six Hills Giant' (Catmint): A vigorous sun lover which will soon make a generous clump. Spikes of tiny purple flowers over aromatic grey/green foliage.

Nepeta grandiflora 'Summer Magic' (Catmint): A more compact, upright growing variety of Catmint with aromatic grey foliage and spikes of lavender blue flowers. Hardy. Up to 35cm.

Nepeta x faassenii 'Kit Cat' (Catmint): A compact variety of catmint making a neat mound of aromatic green foliage and clusters of lavender blue flowers. Hardy. Up to 30cm.

Persicaria amplexicaulis 'Fat Domino' (Bistort 'Fat Domino'): A cracking new variety with plump, dark rose-red flower spikes which last for ages. [Collect Only]

Persicaria amplexicaulis 'Golden Arrow': Striking golden-green arrow-shaped foliage with spikes of reddish pink flowers. Will brighten up dark corners. Hardy. Up to 1m.

Persicaria amplexicaulis 'Rosea': Spikes of pale pink flowers in late summer. Large oval pointed leaves. Grows in most situations as long as not too dry. Hardy. Up to 1.2m. [Collect Only]

Persicaria bistorta 'Hohe Tatra' (Bistort. Was known as Polygonum bistortum): Upright orchid-like pink spikes make a bold show from May to July [Collect Only]

Persicaria bistorta 'Superba' (Bistort. Was known as Polygonum bistortum 'Superbum'): Upright fluffy pink spikes make a bold show in early summer. Great for filling larger spaces. [Collect Only]

Persicaria microcephala Red Dragon' (PBR): Stunning foliage with upright stems of lance-shaped purple-green leaves, with delicate chevron markings in white. Best leaf colour in full sun. Hardy. Up to 90cm. [Collect Only]

Petasites paradoxus (Alpine butterburr): Silvery, wide but pointed leaves in summer. Flowers resembling white studded tennis balls in February. Excellent foliage plant

Pratia angulata (Lawn Lobelia): Starry white flowers above a creeping, evergreen foliage, followed by berries in the autumn. Good ground cover. Hardy. Up to 10cm. [Collect Only]

Rudbeckia subtomentosa 'Little Henry' (PBR) (Sweet black-eyed susan): Yellow quilled flowers with chocolate brown centres in late summer. Compact variety with a delightful vanilla scent. Hardy. Up to 90cm.

Saxifraga stolonifera ' Kinki Purple': Rounded, hairy leaves with green above and red below. Wiry stems topped with white flowers in early autumn. Hardy. Up to 30cm.

Sedum 'Vera Jameson' (Stonecrop 'Vera Jameson): Creeping stems of powdery red leaves topped with reddish pink flowers in late summer

Sisyrinchium striatum 'Aunt May': Open fans of strappy variegated iris-like leaves topped with lemon yellow flowers in summer. Up to 60cm.

Stachys byzantina 'Primrose Heron' (Lamb's ears): A fascinating colour - silvery/lemony/green furry leaves form spreading mats. Great for ground cover in sun.

Stachys byzantina 'Silver Carpet' (Lamb's ears): Silver, furry leaves form spreading mats. A few spikes of silver flowers with the faintest hint of pink in summer.

Tradescantia 'Bilberry Ice' (Spiderwort (Andersoniana Group) 'Bilberry Ice'): Three-petalled icy purple flowers above strappy foliage. [Collect Only]

Tradescantia 'Euridice' (Spiderwort): Three-petalled delicate pale blue flowers above strappy foliage. Great as a ground clump former in sun or part shade. [Collect Only]

Tradescantia 'Innocence' (Spiderwort (Andersoniana Group)): Three-petalled pure white flowers with purple tinged anthers. Strappy bright green foliage.

Tradescantia 'Leonara' (Spiderwort): Three-petalled vibrant violet-blue flowers above strappy foliage. Great as a ground clump former in sun or part shade [Collect Only]

Tragopogon porrifolius (Salsify, 'Jack-go-to-bed-at-noon'): Large, open blue/purple flowers, which close in the afternoon. [Collect Only]

Trollius x cultorum 'Alabaster' (Globeflower): Translucent pale yellow cup shaped flowers from early to late summer.