How to Fertilize iris 'Noctambule'?
Diluted iris feed every three to four weeks during spring bloom

iris 'Noctambule' · Iris 'Noctambule'
Grow in well-drained, fertile, neutral to slightly acid loam in full sun; sun on the rhizome encourages flowering. See also bearded iris cultivation
Diluted iris feed every three to four weeks during spring bloom