We have found 17 plants that meet your criteria.

Yarrow ‘Achillea Moonshine’ Lovely, large sulphur-yellow flowers £5.99 Buy
Columbine ‘Aquilegia Kristall’ Pure white bell-like flowers £5.49 Buy
Wood Spurge ‘Euphorbia Blackbird’ Attractive dark maroon foliage £7.99 Buy
Phlomis ‘Phlomis russeliana’ Pretty whorls of pale yellow flowers £6.99 Buy
Jerusalem Sage ‘Phlomis tuberosa Amazone’ Whorls of lilac flowers and architectural seedheads £6.99 Buy
Yarrow ‘Achillea Summerwine’ Long-lasting, wine-red flowers £5.99 Buy
Price Pruned
Yarrow ‘Achillea Walther Funcke’ Bright, terracotta flowers with flat heads NOW £5.49 Buy
Price Pruned
Spurge ‘Euphorbia polychroma’ Vivid acid yellow flowers NOW £5.49 Buy
Spurge ‘Euphorbia Whistleberry Garnet’ Bold evergreen foliage £6.49 Buy
Daylily ‘Hemerocallis Stafford’ Stunning, scarlet, lily-like flowers £5.49 Buy
Daylily ‘Hemerocallis Stella De Oro’ a dwarf daylily with cheeful yellow flowers £5.99 Buy
Russian Sage ‘Perovskia abrotanoides’ Silvery white aromatic foliage with long lasting blue flowers £7.99 Buy
Price Pruned
Russian Sage ‘Perovskia atriplicifolia Little Spire’ A shorter form of the popular Russian sage NOW £7.99 Buy
Price Pruned
Orchid Primrose ‘Primula vialli’ Spikes of striking, vivid flowers. NOW £4.99 Buy
Kaffir Lily ‘Schizostylis coccinea Major’ Large red flowers are ideal as cut flowers £5.99 Buy
Horned Violet ‘Viola cornuta Alba Group’ Subtly-scented, pure white flowers £5.99 Buy
Wood Violet (syn. Viola labradonica... ‘Viola riviniana Purpurea Group’ Ideal for a woodland garden £4.99 Buy