Green Grow the Rushes is a 1949 comedy novel by the British writer Howard Clewes. The title refers to the traditional folk song "Green Grow the Rushes, O". It revolves around a group of officials from a Whitehall government department who travel to the Kent coast for an investigation, only to find themselves encountering a community entirely committed to smuggling.
It was adapted into a 1951 British film of the same title directed by Derek N. Twist and starring Roger Livesey, Honor Blackman and Richard Burton.