Replant only the healthy sections to prevent overcrowding and promote growth. Dividing ensures your irises remain vibrant and ...

Replant irises in groups about 30cm (1ft) apart, with the rhizome just below the surface. Firm soil around roots and water well.

If in doubt, an iris can easily thrive in a raised flower bed or flowerpot. Dig a shallow hole and replant the iris so that the top of each rhizome or bulb sits at the soil level or just below it.

For most, every three years is about right. The ideal time for lifting, dividing and replanting these irises is right after flowering, in July or August. This gives ample time for new roots to ...