Lobelia, Mass of blue coloured delicate flowers growing outdoor.

Clematis, Clematis 'Rhapsody Fretwell', Clematis 'Rhapsody Fretwell', Blue coloured flowers growing outdoor.

Clematis, Clematis 'Rhapsody Fretwell', Clematis 'Rhapsody Fretwell', Blue coloured flowers growing outdoor.

Beech, Fagus sylvatica, Backlit leaves of the tree against a blue sky.

Beech, Fagus sylvatica, Backlit leaves of the tree against a blue sky.

Alkanet, Anchusa azurea 'Loddon Royalist', Tiny blue coloured flowers growing outdoor.

Wisteria, Japanese Wisteria, Wisteria floribunda, Blue and white coloured flowers growing outdoor.

Cornflower, Centaurea cyanus, Mass of blue coloured flowers growing outdoor.

Cornflower, Centaurea cyanus, Single blue coloured flower growing outdoor.

Blue bugloss, Echium callithyrsum, Close up of blue flower growing outdoor with red Admiral Butterfly.

Box, Common box, Buxus sempervirens, Growing out door in the UK with blue sky behind.

Iris -Iris - Japanese water iris -Iris ensata 'Blue Peter' iris ensata blue peter