We have found 69 plants that meet your criteria.

sea holly (syn. Blue Dwarf)
Eryngium planum 'Blauer Zwerg' sea holly (syn. Blue Dwarf)... Dwarf variety with deep blue flowers £8.49 Buy
lavender
Lavandula angustifolia 'Munstead' lavender A compact variety with blue-purple flowers £7.99 Buy
lavender
Lavandula angustifolia 'Munstead' lavender A compact variety with blue-purple flowers £4.99 Buy
catmint
Nepeta × faassenii catmint Loose drifts of lavender flowers. Great for edging £7.99 Buy
catmint
Nepeta 'Six Hills Giant' catmint A hardy catmint with lavender flowers £7.99 Buy
beard tongue
Penstemon 'Sour Grapes' beard tongue Greyish-blue flowers with metallic sheen £7.99 Buy
Russian sage
Perovskia atriplicifolia 'Little Spire' (PBR) Russian sage A shorter form of the popular Russian sage £9.99 Buy
Russian sage
Perovskia 'Blue Spire' Russian sage Violet-blue flowers and silvery foliage. Great planted en masse £9.99 Buy
New
Russian sage
Perovskia 'Blue Spire' Russian sage Violet-blue flowers and silvery foliage. Great planted en masse £5.99 Buy
fiddleneck
Phacelia tanacetifolia fiddleneck Fast growing, and wildlife friendly £1.79 Buy
New
border phlox
Phlox paniculata 'Blue Paradise' border phlox Fragrant and colourful in summer £5.99 Buy
border phlox
Phlox paniculata 'Blue Paradise' border phlox Fragrant violet flowers all summer £7.99 Buy
Jacobs ladder
Polemonium caeruleum Jacobs ladder Bell-shaped, lavender-blue flowers in early summer. £6.99 Buy
Jacobs ladder
Polemonium reptans 'Stairway to Heaven' Jacobs ladder Distinctive variegated foliage and spring flowers £5.99 Buy
lungwort
Pulmonaria 'Blue Ensign' lungwort Bright blue flowers £6.99 Buy
lungwort
Pulmonaria 'Blue Ensign' lungwort Bright blue flowers £7.99 Buy
Crocus Special Offers
sage (syn. Salvia May Night)
Salvia × sylvestris 'Mainacht' sage (syn. Salvia May... Large indigo-blue flowers NOW £5.99 Buy
sage
Salvia guaranitica 'Black and Blue' sage Towering and impressive £9.99 Buy
common sage
Salvia officinalis common sage A good companion plant £6.99 Buy
purple sage
Salvia officinalis 'Purpurascens' purple sage Attractive red-purple young leaves £6.99 Buy