Resembling a giant sisyrinchium with large, dark inky blue flowers, this showy Mexican plant will show of its best in a hot well-drained position where it will slowly clump up giving reliable midsummer colour. (Click for more details)

Incredibly lovely pale Wedgwood blue starry flowers appear above thin iris-like leaves. This plant was originally grown in a friend's Australian nursery, but grows and flowers unprotected here and produces a rare and valuable colour in the garden. (Click for more details)

Brilliant, deepest cobalt-blue, large starry flowers adorn this beautiful iris-relative from Australia and South America. Hardy in a well-drained position and worth any effort for the colour alone! (Click for more details)

Compact bunches of divided spires of rich sky-blue flowers open over a long period above clumps of thin iris-like leaves. Very long-lived in a well-drained sheltered spot. (Click for more details)