Geranium Mistake

My Geranium girls, have been very happy all winter in the greenhouse.  But As I am bringing them out to harden off, I realise I have made a mistake.    They are all in the ornamental tubs they were planted in last spring, and I cannot get them out !!!!.   What can I do to give them a fair start.  Shall I scrape away what potting I can and then top it up with fresh, and would they appreciate a little feed as well.  They are all flowering away.    Thanks,  Mrs Bouquet