||Cultivation Instructions for Bearded Irises
Your irises will be bare root. They should be planted as soon as possible. They prefer well-drained soil and should be planted with their rhizomes on the surface, in a sunny position. For bearded irises to flower well they need to have their rhizomes in sunshine.
The best time to plant bearded irises is late summer to early autumn, but in a mild winter irises can be planted from late summer through to the following spring. Plants can be potted temporarily until they are planted out into their permanent positions. Established irises should not need watering.
As a general rule the taller the plant the later it will flower. Dwarf bearded irises will flower from April, intermediates in mid May and the tall irises will flower in late May and into early June.
After 3 to 5 years depending on the vigour of the cultivar and growing conditions the irises will need to be lifted and divided. Dig up the whole clump. Divide the clump discarding the old rhizome in the centre, keeping the new growth. Trim the leaves to approx 20cms and replant. Trimming the leaves prevents the newly planted roots being loosened by wind rock.
Cultivation Notes for Beardless Irises
Iris sibirica and Iris pseudacorus (and cultivars) are moisture loving plants which prefer a position in moist soil in sun, but will also enjoy growing as marginal plants at the edge of a pond.
Iris unguicularis and cultivars enjoy well drained soil in sun such as at the base of a south facing wall.