Due about 1 month ago:
Divide
After four years, divide the congested clump from midsummer to early autumn, replanting good-sized sections in groups. Until established, water the new plants well and don?t let them dry out.
Genus: Iris.
Species: Iris germanica.
free-draining alkaline soil
[if you have acidic or peaty soils you can top dress with lime for good results]
full sun well away from other plants so that its not shaded
Yellow
Flowers May?
rhizome