We have found 28 plants that meet your criteria.

Price Pruned
Lavandula angustifolia 'Munstead' Lavender A compact variety with blue-purple flowers NOW £4.99 Buy
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Lavandula x intermedia 'Grosso' Lavender A vigorous variety with violet flowers NOW £4.99 Buy
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Lavandula 'Willow Vale' Lavender Makes a stunning, informal flowering hedge NOW £4.99 Buy
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Lavandula 'x chaytoriae Silver Sands' Lavender Stunning, silver foliage and dark purple flowers NOW £4.99 Buy
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Rosa Rhapsody in Blue '('Frantasia') (PBR)' rose (shrub) The closest to a blue rose NOW £10.99 Buy
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Rosa 'William Lobb' Shrub Rose Scented, deep crimson flowers NOW £10.99 Buy
Aucuba japonica Japanese Laurel Resilient evergreen shrub £8.49 Buy
Aucuba japonica 'Crotonifolia' Spotted Laurel A versatile, variegated evergreen £8.49 Buy
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Buddleja davidii 'Black Knight' Butterfly Bush Sumptuous deep purple flowers NOW £5.99 Buy
Erica x darleyensis 'J. W. Porter' Darley Dale Heath Pretty purplish-pink flowers £3.49 Buy
Fuchsia 'Riccartonii' Fuchsia Delicate, scarlet and dark purple flowers £5.99 Buy
Hebe 'Red Edge' Shrubby Veronica Small hebe with lilac flowers £7.99 Buy
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Lavandula angustifolia 'Hidcote' Lavender A compact lavender, with intense, violet flowers NOW £4.99 Buy
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Lavandula angustifolia 'Melissa Lilac' Lavender Large, lilac flowers in summer NOW £4.99 Buy
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Lavandula pedunculata subsp. 'pedunculata' French Lavender (syn L. stoechas... Distinctive butterfly-like, mauve flowers NOW £4.99 Buy
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Lavandula 'Helmsdale' French Lavender Burgundy-purple flowers topped by purple bracts NOW £4.99 Buy
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Lavandula 'Regal Splendour' Lavender 6 pack Incredible dark purple-violet flags NOW £14.99 Buy
Lavandula 'Rocky Road' French Lavender A new variety with pale pink, butterfly like flowers £6.99 Buy
Price Pruned
Paeonia 'Deep Purple' Tree Peony / Tree Paeony... Tree peony with huge, purple flowers NOW £9.99 Buy
Pittosporum tenuifolium 'Tom Thumb' Kohuhu Small, rounded shrub with purple leaves. £8.99 Buy