We have found 17 plants that meet your criteria.

Hardy Plumbago ‘Ceratostigma willmottianum Forest Blue’ Foliage turns wonderful autumnal colours £6.99 Buy
Lesser Periwinkle syn. V. minor... ‘Vinca minor La Grave’ Gorgeous lavender-blue blooms £5.99 Buy
Price Pruned
Butterfly Bush ‘Buddleja Lochinch’ Fragrant violet-blue flowers all summer NOW £5.99 Buy
Hibiscus (syn. Hibiscus syriacus Blue... ‘Hibiscus syriacus Oiseau Bleu’ Late flowering shrub with... £9.99 Buy
Rough-leaved Hydrangea ‘Hydrangea aspera Villosa Group’ Long-lasting, deep mauve flowers in autumn £10.99 Buy
Lacecap Hydrangea (syn. Blue Wave)... ‘Hydrangea macrophylla Mariesii Perfecta’ Pink or pale blue lacecap flowers £6.99 Buy
Hydrangea ‘Hydrangea serrata Bluebird’ Distinctive blue flowers and autumn colour £8.99 Buy
Price Pruned
Greater Periwinkle ‘Vinca major’ Elegant blue-violet flowers NOW £4.99 Buy
Greater Periwinkle ‘Vinca major Variegata’ Large, bright blue flowers £4.99 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
poppy ‘Ceratostigma willmottianum Desert Skies’ A stunning new variety of hardy plumbago £7.49 coming soon
Meadow Grass ‘Poa colensoi’ A compact blue-green grass £5.99 coming soon
Price Pruned
Periwinkle ‘Vinca difformis’ Perfect for underplanting in shady spots NOW £5.99 coming soon
Price Pruned
Dwarf Rhododendron ‘Rhododendron Blue Diamond Group’ Vivid violet flowers NOW £10.99 coming soon
Common Lilac ‘Syringa vulgaris Katherine Havemeyer’ Wonderful scented lavender-purple flowers £9.99 coming soon