Alchemilla alpina (Lady's mantle): A miniature Alchemilla with dainty, 5 lobed leaves and a froth of tiny green flowers in spring. Height to 10cm. Hardy [Collect Only]

Cephalaria gigantea (Giant scabious): Very tall wavy stems topped with large lemon yellow scabious-like flowers.Easy to grow. May need staking or support. Hardy. Up to 2m.

Coreopsis verticillata 'Grandiflora' (Tickseed 'Grandiflora'): Compact variety with bright and cheery golden yellow daisy-like flowers. Held on wiry stems. Hardy. Up to 60cm.

Epimedium 'Spine Tingler' (Barrenwort 'Spine Tingler'): Very distinctive variety with long, tooth-edged leaves, rather like a holly and lemon yellow flowers. Hardy. To 30cm.

Epimedium pinnatum subsp colchicum (Barrenwort): Attractive, evergreen, spiny, green leaves with yellow flowers held above the foliage. Shady ground cover. Hardy. Up to 30cm.

Epimedium x perralchicum 'Frohnleiten' (Barrenwort 'Frohnleiten'): Heart-shaped leaves are bronze-tinted, wiry stems of yellow, star-like flowers in spring. Shady ground cover. Hardy. Up to 30cm.

Geum 'Georgenberg' (Avens 'Georgenburg'): Gold flowers held atop reddish stems in early to mid-summer. To 30cm. Hardy

Geum 'Stacey's Sunrise' (Avens 'Stacey's Sunrise'): Pale yellow flowers on compact stems above rosettes of rounded hairy leaves. Semi-evergreen. Long flowering. Hardy. Up to 30cm.

Helenium 'Kanaria' (Sneezeweed 'Kanaria'): Masses of clear lemon yellow flowers with swept back petals and central mustardy-gold dome. [Collect Only]

Helenium autumnale 'Fuego' (PBR) (Sneezeweed 'Fuego'): More compact variety with vibrant orange-red flowers with yellow round the centre and brown central disc. Hardy. Up to 50cm. [Collect Only]

Hemerocallis 'Corky' (Daylily 'Corky'): Slender yellow trumpets with mahogany stripe on back. Flowers held high on black stems above fine foliage. Superb plant. To 60cm. Hardy

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 'Stella de Oro' (Day Lily 'Stella de Oro'): Pale yellow fragrant flowers with a darker yellow throat. Grass-like green foliage. Hardy. Up to 50cm.

Hemerocallis citrina (Long yellow day lily): Fragrant lemon, yellow lily flowers on long stems above green strappy foliage. Flowers open in evening. Hardy. Up to 1.2m. [Collect Only]

Leucanthemum x superbum 'Banana Cream' (Shasta Daisy 'Banana Cream'): A more compact form of the Shasta daisy, with pale yellow daisy flowers, fading to cream. Dark green foliage. Hardy. Up to 45cm.

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]

Potentilla 'Esta Ann' (Cinquefoil 'Esta Ann'): Vibrant yellow flowers with a red centre held well above a mound of dark green strawberry-like foliage. Hardy. Up to 40cm.

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

Primula sikkimensis (Himalayan cowslip): Tall stems with clusters of pendulous pale yellow funnel-shaped scented flowers, rising from a rosette of green leaves. Up to 40cm.

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

Rudbeckia fulgida var. sullivantii 'Goldsturm': Large gold flowers with a chocolate eye produced in profusion from late summer well into autumn. Hardy. Up to 60cm. [Collect Only]

Rudbeckia subtomentosa 'Little Henry' (PBR): Yellow quilled flowers with chocolate brown centres in late summer. Compact variety with a delightful vanilla scent. Hardy. Up to 90cm. [Collect Only]

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.

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]