How to Prune iris 'Jurassic Park'?
Remove any dying foliage in autumn; old flower stems can be cut down after flowering

iris 'Jurassic Park' · Iris 'Jurassic Park'
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. Give a high potash feed in spring and divide every 3-4 years. See bearded iris cultivation
Remove any dying foliage in autumn; old flower stems can be cut down after flowering