I need to repot some plants too and when I get round to it I'll use whatever I've got to hand, which will probably be MPC. Because my plant are in dire need of repotting (and have been for years) I tend to dose them with baby bio to assuage my conscience.
Gardening is an excuse not to do housework
Greetings from Salisbury
Qualified member of the Confused Nutter's Club