Posted: 30/10/2013 at 08:42
You dont say which varieties of ornamental grassss you are growing but the principle is the same...viz., move them in the spring and not in autumn. However, I do just that myself albeit aware of the risk of them rotting. On my light soil and mild climate I rarely lose any grasses doing this at this time but it certainly is a risk
If large grasses.....like miscanthus.....you may have to divide them but this is more harmful to them at this time of the year than simply moving them. I would use mpc and use pots that generously contain them. Cut top growth .....not too severely, say half way.......and I would not water at all. So, yes, pot them up now with a view to planting out in the spring.
Good luck Clarington and enjoy your new house and garden