We have found 101 plants that meet your criteria.

Bearded Iris ‘Iris Provencal’ Burgundy flowers speckled with yellow £5.99 Buy
Price Pruned
Bearded Iris ‘Iris Superstition’ Purple-black flowers NOW £5.99 Buy
Everlasting Sweet Pea (syn. L... ‘Lathyrus latifolius Pink Pearl’ Vigorous climber with magenta flowers £5.99 Buy
Price Pruned
Gay Feather ‘Liatris spicata Kobold’ Magenta, bottlebrush-like flowers NOW £5.49 Buy
Giant Catmint ‘Nepeta grandiflora Wild Cat’ A giant catmint with deep purple-blue flowers £5.99 Buy
Oriental Poppy ‘Papaver orientale Manhattan’ Beaufitul lavender-rose flowers £5.99 Buy
Price Pruned
Beard Tongue ‘Penstemon Raven’ Dramatic, deep purple, foxglove-like flowers NOW £5.49 Buy
Phlomis ‘Phlomis cashmeriana’ Distinctive whorls of lilac flowers in high summer £5.99 Buy
Perennial Phlox ‘Phlox paniculata Amethyst’ Tall variety with violet flowers £5.99 Buy
Phlox ‘Phlox paniculata Franz Schubert’ Wonderful, fragrant, lilac flowers £5.99 Buy
Price Pruned
Jacob's Ladder ‘Polemonium caeruleum’ Bell-shaped, lavender-blue flowers in early summer. NOW £4.99 Buy
Price Pruned
Primrose ‘Primula vialli’ Spikes of striking, vivid flowers. NOW £4.99 Buy
Sage ‘Salvia nemorosa Ostfriesland’ Attractive to butterflies and bees £5.99 Buy
Pincushion Flower ‘Scabiosa atropurpurea Ace of Spades’ Gently fragrant they make good cut flowers £5.99 Buy
Purple Mullein ‘Verbascum phoeniceum Violetta’ Spires of papery purple blooms £6.99 Buy
Verbena ‘Verbena rigida’ Iridescent magenta flower heads £5.99 Buy
Culver's Root ‘Veronicastrum virginicum Lavendelturm’ Long tapering flower spires £5.49 Buy
Wood Violet (syn. Viola labradonica... ‘Viola riviniana Purpurea Group’ Ideal for a woodland garden £4.99 Buy
Hollyhock (Althea) ‘Alcea rosea Nigra’ Deep burgundy flowers £5.49 coming soon
Price Pruned
Round-headed Leek ‘Allium sphaerocephalon’ Small, wine-coloured flowers on tall stems NOW £5.49 coming soon