Berberis: I have nothing good to say about it.

As a garden owner, there are some plants I dislike, and won't have in my garden - not just the obvious ones such as Ground Elder and other spreading weeds: proper plants, which other people love and cherish, but which I would put straight in the green waste bin, ie not even worth composting. And as you know (because I am always going on about it), I love composting, and am evangelical about the…