And finally

The Jerusalem artichokes finally flower after reaching ten feet. Not as impressive as sunflowers, but similar and related (Helianthus) hence the name 'Jerusalem', which may be a mishearing of the Italian for sunflower, 'Girasole'. The edible tubers below ground taste nutty and give you wind; an autumnal ritual usual only observed once. If left unharvested they spread and can become invasive. Their value as a natural screen is somewhat diminished by their habit of growing too tall and requiring support and tying-up.