How to Fertilize Iris tectorum 'Cruella'?
Balanced iris feed every three weeks spring growth phase
Iris tectorum 'Cruella' · Iris tectorum 'Cruella'
Grow in well-drained, fertile, neutral to slightly acidic soil in full sun. Do not cover the rhizomes with mulch, or allow other plants to shade them; sun on the rhizomes encourages flowering. Give a high potash feed in spring and divide every three to four years.
Balanced iris feed every three weeks spring growth phase