Posted: 05/04/2015 at 10:43
You could put short term plants, summer bedding, bulbs etc in for a couple of years and buy small plants of the big ones you like and grow them on until big enough for the big containers. You wouldn't have to grow it indoors, hardy plants don't need to be indoors and it would have to be hardy if you're leaving the large containers out all year.
Does that make sense? I don't feel I've put that very clearly