Every year, when I drag my stored dahlia tubers out of the basement, I have a few that refuse to pop. Sometimes it is just one out of several in the same bag, sometimes it is the whole bag. Not a bud ...

Ever heard of dahlia gall? I wouldn’t be surprised if you hadn’t – it’s not something I was familiar with before, either. But since learning how to grow dahlias, I’ve stumbled across the term – and as ...