We have found 15 plants that meet your criteria.

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Buddleja davidii 'Black Knight' Butterfly Bush Sumptuous deep purple flowers NOW £5.99 Buy
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Lavandula 'Helmsdale' French Lavender Burgundy-purple flowers topped by purple bracts NOW £4.99 Buy
Lavandula 'Rocky Road' French Lavender A new variety with pale pink, butterfly like flowers £6.99 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 x intermedia 'Grosso' Lavender A vigorous variety with violet flowers NOW £4.99 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 angustifolia 'Munstead' Lavender A compact variety with blue-purple 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 'Regal Splendour' Lavender 6 pack Incredible dark purple-violet flags NOW £14.99 Buy
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Rosa 'Ferdinand Pichard' rose (hybrid perpetual) An excellent striped rose NOW £10.99 Buy
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Rosa 'Roseraie de l'Haÿ' rose (shrub) Fabulously rich purple-red blooms NOW £9.99 Buy
Rosmarinus officinalis Rosemary A deliciously aromatic favourite £5.99 Buy
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Rosa Falstaff = 'Ausverse (PBR)' Shrub Rose Powerful old rose fragrance NOW £12.99 Buy
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Wisteria sinensis Standard Chinese Wisteria Sweetly scented bluish-lilac flowers NOW £89.99 Buy