Iris was the messenger between earth and sky; a Greek goddess who took the form of a rainbow and who was 'swift-footed like a storm wind'. (Homer,Iliadviii.…
They need a well-drained soil in a sunny position.
You can propagate by division in spring or by stem-tip or softwood cuttings in spring or summer, species only by seed in autumn.
Pests, diseases or disorders
Slugs may damage growth. In dry summers powdery mildew may cause problems.