iris 'Concertina' · Fertilizing

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, as sun on the rhizomes encourages flowering. Give a high-potash feed in spring and divide every three to four years. See bearded iris cultivation

Watering: Medium moisture in growth, then drier once flowering fully finishesSunlight: Full sunHarmful if eaten. Wear gloves and other protective equipment when handling

Diluted iris feed every three to four weeks during spring bloom

How to Fertilize iris 'Concertina'?