Bearded iris

How to grow Bearded iris

Written by the GardenDecoded editorial team · Last reviewed 21 July 2026 · Written for UK gardens · How we research our guidance

Planting

Plant or move in mid to late summer, after flowering. Set the rhizome so its top is visible at the soil surface, facing the sun, with the roots spread beneath it. Do not mulch over the rhizome and do not plant where taller neighbours will shade it by midsummer.

Pruning

Snap off spent flower stems at the base. Leave the leaves to feed the rhizome and only remove them once they brown; cutting foliage back hard in summer weakens next year's flowering.

Propagation

Lift and split clumps every three years or so in summer. Keep the young fans from the outside of the clump, cut the leaves back to a short fan to reduce wind rock, and throw away the old exhausted rhizome.

Pests and diseases

Iris leaf spot causes brown blotches on the foliage in damp summers; remove affected leaves. Rhizomes buried too deep or sitting in wet soil can rot away at the base.

Value to wildlife

Limited. The flowers are visited by bumblebees, which are heavy enough to work into them, but the season is short.

Notes

Shy flowering is nearly always overcrowding, too much shade, or a rhizome planted too deep. Baking in summer sun is part of how this plant sets flower buds.

This guidance was researched and written by GardenDecoded — see our editorial policy for how guides are checked and reviewed.

Other names for this plant

These names have all been used for Iris × germanica but are no longer the accepted name. You may still meet them on old labels, in books, or in nursery catalogues.

Others in Iris