You could repot into bigger pots otherwise you will have to keep moving them and trimming the escaping roots off with secatuers.
or try lining the pots with weed supressant membrane, the water porous one, then the roots may not work their way out. [dont know if it will work but worth a try]

Thank you - been looking at them all again and came to the same conclusions - or - get rid of!!!!!!!!