Posted: 27/03/2016 at 21:38
It wasn't blackspot Verdun. It was a distorted look, like you get when some types of weedkillers have been used, I don't use them and there's no way they could get a dose from anyone else. It was at, or even before, flowering time. I chucked all the affected ones.
All well this year except for one plant that looks a bit iffy