Iris

This is a popular iris, a big hit since being introduced in 1912, with early to midsummer sapphire blue flowers with darker blue veins. The downward-pointing petals are edged white, and the more vertical ones are richer blue. It belongs to the Siberian group of irises, the most elegant kind, which tolerates a wide range of locations. Arrange plants at least 45cm apart, and set them in a deep hole so that the bottom 2.5cm of leaves are buried, then water in and give the occasional, all-purpose feed.