We have found 24 plants that meet your criteria.

Agapanthus africanus African Lily Globes of blue flowers in late summer £6.99 Buy
Agapanthus 'Headbourne Hybrids' African Lily Showy globes of blue and white flowers £6.99 Buy
Echinops bannaticus 'Blue Globe' Globe Thistle Large globes of dark blue flowers £5.99 Buy
Echinops ritro 'Veitch's Blue' Globe Thistle Good for repeat flowering £5.99 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
Iris sibirica 'Caesar's Brother' Siberian Iris Intense violet flowers. Great in boggy ground £5.99 Buy
Iris sibirica 'Perry's Blue' Siberian Flag Looks great planted in bold clumps £5.99 Buy
Iris sibirica 'Silver Edge' Siberian Flag Blue flowers edged with white £5.99 Buy
Iris sibirica 'Tropic Night' Siberian Flag Violet flowers with yellow throats. Good for boggy ground £5.99 Buy
Price Pruned
Lavandula angustifolia 'Elizabeth' Lavender A new variety, with violet flowers NOW £4.99 Buy
Price Pruned
Lavandula angustifolia 'Munstead' Lavender A compact variety with blue-purple flowers NOW £4.99 Buy
Agapanthus 'Lavender Haze' African Lily A new, large-headed variety £8.99 Buy
Echinops bannaticus 'Taplow Blue' Globe Thistle Spherical, bright blue flower-heads £5.99 Buy