We have found 24 plants that meet your criteria.

Price Pruned
Yarrow ‘Achillea millefolium Lilac Beauty’ An unusual lilac, yarrow NOW £5.49 Buy
Dusky Cranesbill ‘Geranium phaeum’ Small, deep maroon flowers. Good for groundcover £5.99 Buy
Price Pruned
Dusky Cranesbill ‘Geranium phaeum var. phaeum Samobor’ Small, purple-black flowers. Good for damp or dry shade NOW £5.49 Buy
Cranesbill ‘Geranium pratense Midnight Reiter’ Unusual deep purple foliage £5.99 Buy
Geranium ‘Geranium sylvaticum Birch Lilac’ Great for a woodland setting £5.99 Buy
Intermediate Bearded Iris ‘Iris Rare Edition’ Eyecatching variety with purple and white petals £6.99 Buy
Price Pruned
Lavender ‘Lavandula angustifolia Hidcote’ A compact lavender, with intense, violet flowers NOW £4.99 Buy
Price Pruned
Lavender ‘Lavandula angustifolia Munstead’ A compact variety with blue-purple flowers NOW £4.99 Buy
Price Pruned
Lavender ‘Lavandula x chaytoriae Silver Sands’ Stunning, silver foliage and dark purple flowers NOW £4.99 Buy
Jerusalem Sage ‘Phlomis tuberosa Amazone’ Whorls of lilac flowers and architectural seedheads £6.99 Buy
Price Pruned
Dusky Cranesbill ‘Geranium phaeum Lily Lovell’ Iridescent saucers of purple flowers. Good for shade NOW £5.49 Buy
Armenian Cranesbill ‘Geranium psilostemon’ Gorgeous magenta flowers with black centres £5.99 Buy
Shrubby Veronica ‘Hebe Red Edge’ Small hebe with lilac flowers £7.99 Buy
Siberian Iris ‘Iris chrysographes black-flowered’ Stunning, almost black flowers. For a damp spot £6.99 Buy
Intermediate Bearded Iris ‘Iris Langport Flame’ Sumptuous purple and orange fragrant flowers £6.99 Buy
Price Pruned
Lavender ‘Lavandula angustifolia Imperial Gem’ An excellent variety for low hedges NOW £5.99 Buy
Price Pruned
Lavender ‘Lavandula angustifolia Melissa Lilac’ Large, lilac flowers in summer NOW £4.99 Buy
Price Pruned
French Lavender ‘Lavandula Helmsdale’ Burgundy-purple flowers topped by purple bracts NOW £4.99 Buy
Price Pruned
French Lavender (syn L. stoechas... ‘Lavandula pedunculata subsp. pedunculata’ Distinctive butterfly-like, mauve flowers NOW £4.99 Buy
Price Pruned
Lavender 6 pack ‘Lavandula Regal Splendour’ Incredible dark purple-violet flags NOW £14.99 Buy