Blackberry lily (Iris domestica)

Photo: Tom Murphy VII, CC BY 2.5 · source

Pruning guide · Perennial

Blackberry lily: when and how to prune

Iris domestica

Blackberry lily is best pruned in March.

Key facts
Pruning monthsMarch
FloweringJuly–August
Native to BelgiumNo, planted
Poisonous to people and petsYes, take care with children and pets

Blackberry lily: when to prune it?

In March you cut back the dead foliage; in October you cut the seed clusters for dried arrangements.

What else to prune in those months? March

Blackberry lily: how to prune it?

  1. Cut the dead foliage down to just above the ground in March.
  2. Cut stems with seed clusters in October and hang them upside down to dry.
  3. Remove faded flowers if you do not want seedlings.

How much to cut, and how often?

  • One pruning period a year: March.

What does it mean for wildlife?

  • If you only cut back in March, the old stems stand through the winter: insects overwinter in them and birds eat the seeds.

Caution: All parts are poisonous, especially the rhizome and seeds. Wear gloves: the sap can irritate the skin.

Nearby: related pruning guides

Plant profile: Blackberry lily · Pruning calendar and basic rules

This guide is compiled from the Bladwijzer plant profile and pruning calendar.

Laden…