We have found 83 plants that meet your criteria.

Eryngium x zabelii 'Jos Eijking' Sea Holly Spiny metallic-blue flowers in late summer £7.99 Buy
Geranium himalayense 'Gravetye' Cranesbill Large, purple-blue flowers with reddish centres £5.99 Buy
Geranium pratense 'Mrs Kendall Clark' Meadow Cranesbill Plenty of charming first rate flowers £5.99 Buy
Geranium wallichianum 'Buxton's Variety' Cranesbill Late flowering, with soft, blue-mauve flowers £6.99 Buy
Geranium x magnificum 'Rosemoor' Cranesbill Glorious violet-purple flowers £5.99 Buy
Geranium 'Brookside' Cranesbill Deep blue flowers and long flowering seasons £5.99 Buy
Geranium 'Johnson's Blue' Cranesbill Elegant blue flowers, good for groundcover £4.99 Buy
Geranium 'Philippe Vapelle' Cranesbill A mass of light sky-blue flowers in June and July £5.99 Buy
Geranium 'Spinners' Cranesbill Wonderful large deep purple blue blooms £5.99 Buy
Hosta 'Patriot' Plantain Lily White-margined leaves £5.99 Buy
Nepeta subsessilis 'Cool Cat' Catmint Lavender-blue flowers. Great for a herb garden £5.99 Buy
Nepeta subsessilis 'Washfield' Catmint Pretty catmint with bright blue flowers £5.99 Buy
Nepeta x faassenii Catmint Loose drifts of lavender flowers. Great for edging £5.99 Buy
Nepeta x faassenii 'Kit Cat' Catmint A dwarf variety with purple flowers £5.99 Buy
Price Pruned
Nepeta 'Six Hills Giant' Catmint A hardy catmint with lavender flowers NOW £4.99 Buy
Penstemon 'Jean Grace' Beards Tongue Stunning mediterranean blue flowers £5.99 Buy
Penstemon 'Sour Grapes' Beard Tongue Greyish-blue flowers with metallic sheen £5.49 Buy
Perovskia abrotanoides Russian Sage Silvery white aromatic foliage with long lasting blue flowers £7.99 Buy
Perovskia 'Blue Spire' Russian Sage Violet-blue flowers and silvery foliage. Great planted en masse £7.99 Buy
Price Pruned
Phlox divaricata 'Blue Perfume' Phlox Masses of lilac-blue fragrant blooms NOW £5.49 Buy