Divide pond Iris plants now

Divide pond Iris plants now

Divide Pond Iris plants now on marginal pond shelf:

  • Divide pond Iris plants once they have flowered.
  • Some Iris clumps may need cutting apart with a knife
  • Have new mesh baskets and clay compost ready.
  • Do not cut too small - 2-3 growth heads per new section.
  • Cut down in height to 15cm/6" above water surface level so that they will re-establish more quickly.
  • Add a Feed balls for Aquatic plants to encourage regrowth and flowering next year.
  • Firm down well and replace in pond on top shelf until roots appear through the mesh basket.
  • Do not divide every clump of Iris in the same year - spread across 3 years in rotation.
  • Leave some emergent pond Iris untouched so dragonfly and damselfly larvae can use these leaves to climb up when they emerge from the pond to become adults.

 Iris in a container pond:

  • If this container pond Iris has outgrown the basket divide it in the same way as above
  • Discard older sections or make a second basket to sit in another position in the support grid.

For more details on how to divide pond Iris plants please see our Tips and Advice page - Plant Propagation

Divide moist loving Iris sibirica or Iris ensata clumps too:

  • 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.