We have found 11 plants that meet your criteria.

Hardy Plumbago ‘Ceratostigma willmottianum Forest Blue’ Foliage turns wonderful autumnal colours £6.99 Buy
Price Pruned
Butterfly Bush ‘Buddleja Lochinch’ Fragrant violet-blue flowers all summer NOW £5.99 Buy
Hardy Plumbago ‘Ceratostigma willmottianum Desert Skies’ A stunning new variety of hardy plumbago £7.49 Buy
Hibiscus (syn. Hibiscus syriacus Blue... ‘Hibiscus syriacus Oiseau Bleu’ Late flowering shrub with... £9.99 Buy
Common Lilac ‘Syringa vulgaris Katherine Havemeyer’ Wonderful scented lavender-purple flowers £9.99 Buy
Price Pruned
Greater Periwinkle ‘Vinca major’ Elegant blue-violet flowers NOW £4.99 Buy
Greater Periwinkle ‘Vinca major Variegata’ Large, bright blue flowers £5.99 Buy
Lesser Periwinkle ‘Vinca minor’ Superb ground cover £5.99 Buy
Lesser Periwinkle ‘Vinca minor Argenteovariegata’ Creamy-white leaves £5.99 Buy
Price Pruned
Periwinkle ‘Vinca minor Illumination’ Brand new introduction NOW £5.99 Buy
Lesser Periwinkle syn. V. minor... ‘Vinca minor La Grave’ Gorgeous lavender-blue blooms £5.99 Buy