How to Fertilize Iris pallida subsp. cengialti?
Diluted iris feed every three to four weeks during spring bloom

Iris pallida subsp. cengialti · Iris pallida subsp. cengialti
Thrives in a sunny position, in neutral to slightly acid soil with good drainage. Plant rhizomes just above soil level, as sun on the rhizomes encourages flowering. See bearded iris cultivation
Diluted iris feed every three to four weeks during spring bloom