Mock Orange

It would be nice to have a stronger sense of smell, mine has never been very good. This is Mock Orange (Philadelphus coronarius) of which I have three in the garden A huge single one, a small double one and a middle sized one which has never flowered as yet. I can just about smell the double one but not the single one. I remember Mock Orange as having a much stronger scent when I was younger – is that old age affecting the memory or the nasal passages, I wonder.