Divide moist and pond Iris plants now

Divide moist and pond Iris plants now

Divide moist loving Iris sibirica clumps:

  • Lift and divide clumps after flowering is finished
  • Discard the central sparse sections.
  • Split the remaining clump into large sections.
  • Replace the areas of the clump with plenty of shoots back into the soil with additional compost from the garden compost heap to replenish the nutrients recently used in flowering.
  • Doing this now allows the plant to root down well and recover before Winter.

Do not divide every clump of Iris in the same year so that you have a rotation system going on.

Pond Iris on marginal pond shelf:

  • Divide once they have flowered
  • Do some every year in a 3 year rotation system.
  • Leave some emergent pond Iris untouched so some will be of value to dragonfly and damselfly larvae.
  • They use these leaves to climb up when they are emerging from the pond to become adults.
  • Cut down in height so that they will re-establish more quickly.

Water Iris in a container pond:

  • If this has outgrown the basket it can be divided in the same way
  • Discard older sections or make a second basket to sit in another position in the support grid.

For more details on how to divide a Water Iris please see our Tips and Advice page.