We have found 136 plants that meet your criteria.

Monkshood ‘Aconitum napellus’ Gorgeous deep blue flowers glow in the shade £5.99 coming soon
Monkshood ‘Aconitum Stainless Steel’ Striking metallic-blue hooded flowers £7.99 coming soon
African Lily ‘Agapanthus africanus’ Globes of blue flowers in late summer £5.99 Buy
Agapanthus (syn. Senna) ‘Agapanthus Back in Black’ Stunning, deep blue flowers £6.99 coming soon
African Lily ‘Agapanthus Black Pantha’ Deep blue, almost black flowers £8.99 Buy
African Lily ‘Agapanthus Glen Avon’ Magnificent new variety £6.99 coming soon
African Lily ‘Agapanthus Headbourne Hybrids’ Showy globes of blue and white flowers £5.99 Buy
African Lily ‘Agapanthus Lavender Haze’ A new, large-headed variety £6.99 Buy
Price Pruned
African Lily ‘Agapanthus Peter Pan’ A compact variety with pale blue flowers NOW £9.99 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
Price Pruned
Bugle ‘Ajuga reptans Burgundy Glow’ Multi-coloured evergreen foliage NOW £4.99 Buy
Price Pruned
Bugle ‘Ajuga reptans Catlin's Giant’ Handsome evergreen ground cover NOW £4.99 Buy
Price Pruned
Amsonia ‘Amsonia tabernaemontana’ Dense clusters of ice-blue, star-like flowers NOW £5.99 Buy
Alkanet ‘Anchusa azurea Loddon Royalist’ Intense blue flowers in early summer £5.49 Buy
Wood Anemone ‘Anemone blanda’ Bright little jewels in spring £2.99 coming soon
Price Pruned
Alpine Columbine ‘Aquilegia alpinum’ Delicate, nodding blue flowers in spring NOW £4.99 coming soon
Price Pruned
Granny's Bonnet ‘Aquilegia caerulea’ A cottage garden favourite NOW £4.99 Buy
Price Pruned
Columbine ‘Aquilegia McKana Hybrids’ Bonnet-like flowers in a range of colours NOW £4.99 Buy
Granny's Bonnet ‘Aquilegia vulgaris var. stellata Blue Barlow’ Stunning violet-blue double flowers £5.49 coming soon