We have found 10 plants that meet your criteria.

Lesser Periwinkle syn. V. minor... ‘Vinca minor La Grave’ Gorgeous lavender-blue blooms £5.99 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
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