Photo: Laitche, CC BY-SA 3.0 · source
Pruning guide · Perennial
Japanese iris: when and how to prune
Iris ensata
Japanese iris is best pruned in July and November.
| Pruning months | July and November |
|---|---|
| Flowering | June–July |
| Native to Belgium | No, planted |
| Poisonous to people and pets | Yes, take care with children and pets |
Japanese iris: when to prune it?
It is hardly pruned. After flowering, in July, cut off the spent stems, and in November the dead leaves.
Japanese iris: how to prune it?
- Cut spent flower stems off close to the ground.
- In November, when the leaves have turned brown, cut them back to 10–15 cm above the ground.
- Clear away the old leaves so that diseases and slugs cannot overwinter in them.
How much to cut, and how often?
- There are 2 pruning periods a year: July and November. You don’t have to prune in every one.
What does it mean for wildlife?
- Don’t cut more than you need to: what stays standing gives insects and birds food and shelter.
Caution: Wear gloves: the sap of the rhizome can irritate the skin. Japanese iris is poisonous: wear gloves and keep clippings away from children, pets and livestock.
Nearby: related pruning guides
Plant profile: Japanese iris · Pruning calendar and basic rules
This guide is compiled from the Bladwijzer plant profile and pruning calendar.