Posted: 14/05/2013 at 17:16
Agree with obelixx. No harm will come anyway by cutting.
Now I know why I've got Doogle in my garden............
However, I pot on to grow bigger before planting out if only for appearance sake....3 small plug grasses, etc. look woeful and tiny in the garden scene. Grow on for another 3 weeks and then plant out for an impact planting that looks good. Your carex will have made quite a lot of growth by then