From Joseph Nicholas, London, UK
Although I am a gardener and an allotment plot-holder, I agree with James Wong’s calculation that the cost of growing one’s own veg exceeds supermarket prices. But what his purely economic calculus omits is the mental satisfaction derived from a hands-on engagement with the natural world, never mind the incalculable benefit of knowing just where one’s potatoes, tomatoes, leeks, cabbages, beans, etc. came from (21 September, p 44).
