A lot of the composts here in France make your hands black and don't smell, (don't think compost is meant to smell?) but they seem to work OK. I add 6 month slow fertilier granules to it in the large pots for summer bedding, even though some says it has fertiliser because often it only has a temporary effect. We don't have John Innes here either. A lot of French compost has peat in it, but just recently there is more peat free for sale than there used to be.