There are two methods of approach when people have a question for me. The first is a distinctly sideways gambit, with the interlocutor stalking me through chat about a number of diverse subjects but inching closer to the moment of attack. Then, usually with an apologetic disclaimer, the question will be popped.
The other approach is direct, even abrupt. I will be buying petrol, getting into a cab or sitting next to someone on a plane or train and, without any preamble, I will be asked how to fix their lawn or deter slugs, why their camellias do not flower or carrots fail to germinate, or one of a thousand troubles that horticulture is heir to.
Wherever I go and whatever I do, people always, always ask me a gardening question.…