hello, happy new year to everyone. haven't need to ask a question in ages but now have a bit of a problem
have noticed that the above shrubs which have been in large glazed ceramic pots for several years aren't looking as healthy as they should be. none of them did really well at all last year (bearing in mind the constant rain we all had), and they don't seem to have grown very much either. none of them produced any catkins the previous year and don't look as if they're going to this year either.
my question is this -- if they are left in pots, do they NOT grow as big as something which is in grown the ground ?? If this is correct, then how do i encourage healthier growth with a view to eventually having plants that do produce catkins ???