How to Water Iris 'White Excelsior'?
Deep irrigation after top soil dries out, drain excess water from rhizomes

Iris 'White Excelsior' · Iris 'White Excelsior'
Grow in any moderately fertile, neutral to alkaline, well drained soil in full sun. Plant bulbs at twice their height in late summer or early autumn and feed with a high potash fertiliser after flowering. See bulb iris cultivation for more information
Deep irrigation after top soil dries out, drain excess water from rhizomes