Amsonia tabernaemontana (Blue dogbane): Starry blue flowers on strong stems with willowy green leaves. Hardy. Up to 90cm. [Collect Only]

Aquilegia chrysantha 'Yellow Queen' (Granny's bonnet. Columbine 'Yellow Queen'): Bright yellow, fragrant flowers with long spurs on tall stems above ferny foliage. Prefers some shade. Hardy. Up to 90cm. [Collect Only]

Aster trifoliatus subsp. ageratoides 'Ashvi': White flowers in a neat mound over a very long season - July to November. Hardy. Up to 80cm.

Astilbe 'Ellie': Large, upright panicles of white flowers in mid-summer over dark green ferny foliage. Hardy. Up to 80cm. [Collect Only]

Astrantia major 'Abbey Road' (PBR) (Hattie's pincushion, Masterwort 'Abbey Road'): Dark red flowers on dark almost-black stems above green foliage. Grow in damp soil and good light for best colour. Long-flowering. Hardy. Up to 80cm. [Collect Only]

Astrantia major Gill Richardson Group (Hattie's pincushion, Masterwort 'Gill Richardson'): Superb variety with cherry red flowers held above strong green foliage. Repeat flowers readily if dead-headed. Hardy. Up to 90cm.

Astrantia major subsp. involucrata 'Shaggy' (Hattie's pincushion, Masterwort 'Shaggy'): Greenish white umbel flowers surrounded by long white bracts above mounds of green palmate leaves. Long flowering. Up to 80cm. Hardy [Collect Only]

Campanula Iridescent Bells = 'Iribella' (PBR) (Bellflower 'Iridescent Bells'): Purple buds open to silvery-lilac bells in summer. Prefers a moisture retentive soil. Height to 80cm. Hardy

Crocosmia crocosmiiflora 'Red King': Sprays of vibrant red flowers with yellow centres, over bright green strappy foliage in late summer. Hardy. Up to 70cm.

Euphorbia palustris (Marsh spurge): Bright acid green bracts in spring. Height to 90cm. Hardy. [Collect Only]

Gaura lindheimeri Rosyjane = 'Harrosy' (PBR) (Gaura 'Rosyjane'): Airy sprays of pink flowers with a white petal centre. Perennial, but dislikes winter wet and doesn't thrive outdoors in cold areas. To 80cm.

Geranium 'Blue Cloud' (Cranesbill 'Blue Cloud'): Tall cultivar with pale blue flowers & dark purple veining above deeply divided green leaves. Long-flowering. Hardy. Up to 90cm. [Collect Only]

Geranium pratense 'Cloud Nine' (Meadow cranesbill 'Cloud Nine'): An attractive double form of the familiar meadow cranesbill with lovely soft blue flowers. Strong growing. Hardy. Up to 90cm. [Collect Only]

Geranium pratense f. albiflorum 'Laura' (PBR) (Meadow cranesbill 'Laura'): An attractive double form of the familiar meadow cranesbill with lovely pure white flowers. Strong growing. Hardy. Up to 70cm. [Collect Only]

Hemerocallis 'Marion Vaughn' (Day Lily 'Marion Vaughn'): Large, creamy lemon flowers over a long period in mid-summer. Height to 80cm. Hardy. [Collect Only]

Hemerocallis 'Sammy Russell' (Day lily 'Sammy Russell'): Rich, bronzey-red flowers in mid-summer over strappy foliage. [Collect Only]

Hosta 'Empress Wu' (PBR): One of the largest leaved Hostas in cultivation - possibly the largest. Leaves up to 18" across when established. [Collect Only]

Hosta 'Frances Williams': Large heart-shaped crinkled leaves with a prominent green-yellow margin. Lavender purple flowers in mid summer. Hardy. Up to 75cm.

Hosta 'Krossa Regal': A robust variety with tall grey-green leaves with deep veins. Lilac flowers in mid-summer. Also good in containers. Hardy. Up to 1m. [Collect Only]

Iris sibirica (Siberian Iris): Soft, purplish blue iris flowers over strappy green foliage. [Collect Only]

Kirengeshoma palmata (Koreana Group) (Yellow wax bells): Yellow waxy flowers hang over palmate foliage. A shade lover. To 80cm. Hardy

Lobelia cardinalis 'Queen Victoria' (Cardinal flower 'Queen Victoria'): Upright spikes of red leaves, topped with scarlet flowers. A perennial, but can be short lived. to 80cm. Hardy.

Lobelia cardinalis 'Russian Princess' (Cardinal flower 'Russian Princess'): Upright spikes of red leaves, topped with fuchsia pink flowers.

Lobelia siphilitica (Blue cardinal flower): Tall spikes of clear blue flowers and bright green lance-shaped leaves. Needs a soil which doesn't dry out. Hardy. Up to 90cm.

Lobelia siphilitica 'Alba' (Cardinal flower 'Alba'): Tall spikes of white flowers and bright green lance-shaped leaves. Needs a soil which doesn't dry out. Hardy. Up to 90cm.

Lythrum virgatum 'The Rocket' (Wand loosestrife 'The Rocket'): Slender upright spires of deep pink flowers from early to late summer. Likes moist conditions. Hardy. Up to 90cm. [Collect Only]

Melica altissmima 'Alba': Deciduous grass with green strappy leaves and delicate sprays of white flowers. Very tactile plant. Hardy. Up to 90cm.

Penstemon 'Apple Blossom': Pale pink tubular flowers with a white throat over semi-evergreen, narrow foliage. Frost hardy. To 70cm.

Penstemon 'Pensham Just Jayne': Bright pink tubular flowers with darker centres and white markings. Semi-evergreen in milder areas. Protect from hard frosts.To 50cm. Frost hardy. [Collect Only]

Phlox paniculata 'Bright Eyes' (Phlox 'Bright Eyes'): Pink scented flowers with a darker pink eye. To 90cm. Hardy

Phlox paniculata 'Eventide' (Phlox 'Eventide'): Mauve-purple, scented flowers on erect stems and green lance-shaped leaves. A good vigorous selection. Hardy. Up to 90cm. AGM [Collect Only]

Phlox paniculata 'Laura' (Phlox 'Laura'): Dense clusters of lavender pink flowers with a white eye, in mid-summer. Scented. Hardy. Up to 80cm.

Rudbeckia fulgida var. deamii: Classic garden perennial flowering in mid-late summer with bright gold daisy flowers with black centres. Hardy. Up to 60cm.

Sidalcea 'Elsie Heugh' (Prairie mallow 'Elsie Heugh'): Spikes of large clear pink flowers above rounded bright green leaves. To 80cm. Hardy

Sidalcea 'Sussex Beauty' (Prairie mallow 'Sussex Beauty'): Large candy pink flowers held on stiff upright stems above rounded green foliage.To 70cm. Hardy [Collect Only]

Sidalcea 'William Smith' (Prairie mallow 'William Smith'): Rich rose pink flowers on upright spikes in mid-summer. Round, glossy, semi-evergreen leaves. Hardy. Up to 90cm. [Collect Only]

Thalictrum Nimbus Pink = 'Tntnp' (PBR) (Rue 'Nimbus Pink'): A new variety with dense clouds of fluffy lavender pink flowers on dark stems above grey-green ferny foliage like an aquilegia. Hardy. Up to 70cm.

Trollius chinensis 'Golden Queen' (Globeflower 'Golden Queen'): Glowing gold cup-shaped flowers with a very prominent central boss of gold anthers. Really stunning. [Collect Only]