We have found 47 plants that meet your criteria.

African Lily ‘Agapanthus africanus’ Globes of blue flowers in late summer £5.99 Buy
Price Pruned
Mexican Giant Hyssop ‘Agastache Blue Fortune’ Spires of lilac flowers and aromatic leaves NOW £5.49 Buy
Price Pruned
Bugle ‘Ajuga reptans Atropurpurea’ Good groundcover for shade NOW £4.99 Buy
Aster ‘Aster Little Carlow (cordifolius hybrid)’ Pretty violet-blue daisies in late summer £5.99 Buy
Michaelmas Daisy ‘Aster x frikartii Monch’ Lavender-blue, daisy flowers £5.99 Buy
Price Pruned
Hardy Plumbago ‘Ceratostigma willmottianum’ Excellent red autumn foliage NOW £4.99 Buy
Cranesbill ‘Geranium Brookside’ Deep blue flowers and long flowering seasons £5.99 Buy
Cranesbill ‘Geranium himalayense Gravetye’ Large, purple-blue flowers with reddish centres £5.99 Buy
Cranesbill ‘Geranium Johnson's Blue’ Elegant blue flowers, good for groundcover £4.99 Buy
Cranesbill ‘Geranium Philippe Vapelle’ A mass of light sky-blue flowers in June and July £5.99 Buy
Meadow Cranesbill ‘Geranium pratense Mrs Kendall Clark’ Plenty of charming first rate flowers £5.99 Buy
Cranesbill ‘Geranium x magnificum Rosemoor’ Glorious violet-purple flowers £5.99 Buy
Catnip ‘Nepeta racemosa Walker's Low’ Long flowering period £5.99 Buy
Catmint ‘Nepeta subsessilis Cool Cat’ Lavender-blue flowers. Great for a herb garden £5.99 Buy
Catmint ‘Nepeta subsessilis Washfield’ Pretty catmint with bright blue flowers £5.99 Buy
Catmint ‘Nepeta x faassenii’ Loose drifts of lavender flowers. Great for edging £5.99 Buy
Catmint ‘Nepeta x faassenii Kit Cat’ A dwarf variety with purple flowers £5.99 Buy
Price Pruned
Perennial Phlox ‘Phlox paniculata Blue Paradise’ Fragrant violet flowers all summer NOW £5.49 Buy
Sage ‘Salvia patens’ Large, stunning blue blooms £5.99 Buy
African Lily ‘Agapanthus Headbourne Hybrids’ Showy globes of blue and white flowers £5.99 Buy