Posted: 21/04/2012 at 09:06
Mine do this too. Apparently its very normal. They need so much energy to push up that magnificant flower that the leaves start to suffer as all food / power is sent to flower. I now under plant to cover the leaves - I have used, forget me nots, hostas look good (if early) - and emerging perennials like astrantia.
When they get very tatty - I cut the ends of the leaves off - doesnt seem to do them any harm and show very well the next year too