Siberian iris 'Roisin'

Grow in any good garden soil that is preferably moist but not waterlogged. In drier soils, dig in well-rotted organic matter before planting then apply as a mulch each spring

Remove any dying foliage in autumn, old flower stems can be cut down after flowering

Propagate by division of rhizomes from midsummer to early autumn

May be attacked by slugs, snails and thrips

May be subject to grey moulds