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  • dividing

    • From mid April to mid May    • once

      PropagationPropagate by division in early spring or autumn, or propagate by root cuttings

  • fertilising

    • From begin March to end March    • once

      Tidy up old dead leaves in March, then mulch well.

  • flowering

    • From begin July to end August
  • pruning

    • From mid September to end October    • once

      PruningCut back in late autumn

  • topping

    • From begin July to mid September    • once

      Cut back the stalks after the flowers have faded