The kind of iris that flowers in May is the bearded iris, normally seen with blue or purplish flowers. Bearded iris is a medium to tall plant, seen growing in a clump at the middle or front of mixed borders. It is very common in its blue forms, and there are many other colours too. In a country garden, the iris provides colour and softness. It comes into flower just as the fresh new foliage flushes fully open on trees and shrubs, the blue iris colour making a wonderful contrast with the fresh and varied green colours of the expanding leaves, not least its own.