We have found 21 plants that meet your criteria.

Yarrow ‘Achillea filipendulina Cloth of Gold’ Flat, plate-like yellow flowers on tall stems £5.99 Buy
Yarrow ‘Achillea millefolium Red Velvet’ Deep red, flat heads of flowers and feathery foliage £5.49 Buy
Yarrow ‘Achillea Moonshine’ Lovely, large sulphur-yellow flowers £5.99 Buy
Angelica ‘Angelica gigas’ Tall, dramatic burgundy flowers £6.99 Buy
Wild Angelica ‘Angelica sylvestris Vicar's Mead’ Great for a wildflower garden £6.99 Buy
Milk Parsley ‘Selinum wallichianum’ Flower clusters have a tiered appearance £6.99 Buy
Moor Grass ‘Sesleria autumnalis’ Perfect for informal edging £5.99 Buy
Price Pruned
Yarrow ‘Achillea millefolium Cerise Queen’ Flat, magenta flowers on tall stems NOW £5.49 Buy
Price Pruned
Yarrow ‘Achillea millefolium Lilac Beauty’ An unusual lilac, yarrow NOW £5.49 Buy
Yarrow ‘Achillea millefolium Paprika’ Bright, orange-red flowers £5.99 Buy
Sneezewort ‘Achillea ptarmica The Pearl’ Masses of snow-white, button flowers £5.99 Buy
Price Pruned
Yarrow ‘Achillea Terracotta’ Long-lasting, rich terracotta flowers NOW £5.49 Buy
Price Pruned
Yarrow ‘Achillea Walther Funcke’ Bright, terracotta flowers with flat heads NOW £5.49 Buy
African Lily ‘Agapanthus Glen Avon’ Magnificent new variety £6.99 Buy
Cardoon ‘Cynara cardunculus Cardy’ A fabulous architectural plant £5.99 Buy
Giant Sea Holly ‘Eryngium giganteum Silver Ghost’ Stunning silvery white bracts £6.99 Buy
Sea Holly ‘Eryngium x zabelii Jos Eijking’ Spiny metallic-blue flowers in late summer £6.99 Buy
Yarrow ‘Achillea Summerwine’ Long-lasting, wine-red flowers £5.99 coming soon
Agapanthus (syn. Senna) ‘Agapanthus Back in Black’ Stunning, deep blue flowers £6.99 coming soon
Sea Holly ‘Eryngium planum Blaukappe’ Tall, with intensely blue flowers £5.49 coming soon