Iris are pretty spectacular.  We have a nice clump in the corner of the back patch.  Psychedelic blues and purples.

They are in flower now, and have been for at least week, which is the last week of May and heading into early June.

Iris are perennial, relatively hardy and easy to grow if they are in the right location.  They do well in well-drained to dry soil in full sun.

Iris grow by rhizomatic spread.  According to the Royal Horticultural Society plant iris rhizomes from July to October, spacing plants 1 foot apart (30cm).

Ensure root sections are partially exposed to the sun.

Adding sand and grit to ground for iris is recommended.

Divide clumps every 3 or 4 years.  Plants can be divided after flowering from early- to late-summer.  The RHS recommends dividing in August.