This grower is sure of this plant identification.
This is the black form sometimes known as 'Black Knight'. Needs a constantly moist soil to do really well.
Iris chrysographes. This species has linear grey-green leaves. The flowers are borne in the summer with fragrant dark red-purple blooms.
They are fully hardy, but some groups may thrive only in specific growing conditions. All irises are best planted in late summer and early autumn. Outdoors you can grow them in well drained, fertile, neutral or slightly acid or alkaline soil in full sun to lightly dappled shade. In order for irises to thrive, most of them need long, hot summers. Irises that require protection from rain or frost should be grown under glass.
Grown for their distinctive and colourful flowers. Suitable for coastal conditions.
Italics = data drawn from parent genus or speciesView Full Plant Finder Record