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.

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

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

Eryngium x zabelii 'Jos Eijking' (Sea Holly 'Jos Eijking'): Large steely blue bracts surround a dome of tiny blue flowers in summer. Long-lasting flowers.Thrives in a sunny,dry spot. To 70cm. Hardy. [Collect Only]

Eryngium x zabelii 'Violetta' (Sea Holly 'Violetta'): Deep dark-blue form of the Sea Holly with bracts surrounding a dome of tiny blue flowers. Thrives in sunny, dry gardens. Hardy. Up to 80cm. [Collect Only]

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

Lamprocapnos spectabilis 'Alba' (formerly Dicentra) (Bleeding Heart, Dicentra): Pure white form of the familiar Bleeding Heart. [Collect Only]

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

Liatris spicata 'Alba': Spikes of white flowers in mid to late summer. Very useful vertical accent. Bees adore it. To 80cm. 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 'Festiva Maxima' (Paeony 'Festiva Maxima'): A strongly scented form with large double frilly white flowers with tints of pink in the centre. Glossy dark green leaves. Hardy. Up to 90cm. [Collect Only]

Paeonia lactiflora 'Moon of Nippon' (Paeony 'Moon of Nippon'): Large single white flowers with a mass of frilly central bright yellow petaloids. Highly scented. Glossy dark green leaves. Hardy. Up to 90cm. [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]

Penstemon 'Andenken an Friedrich Hahn' (Syn. Penstemon 'Garnet'): Wine-red tubular flowers with white throat markings and narrow leaves. Semi-evergreen in milder areas. Protect from hard frosts.

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]

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