How big a garden would you need to be self-sufficient for a family of four?

The long-running series in which readers answer other readers' questions on subjects ranging from trivial flights of fancy to profound scientific and philosophical conceptsHow big a garden would you need to be self-sufficient for a family of four? Andy Crouch, HenllanPost your answers (and new questions) below or send them to nq@theguardian.com. A selection will be published next Sunday. Continue reading...