High Quality Content by WIKIPEDIA articles! Green Grow the Rushes, Ho (or O) (aka The Twelve Prophets, or The Carol of the Twelve Numbers, or The Teaching Song, or The Dilly Song), is a folk song (Roud #133) popular across the English-speaking world. It is sometimes sung as a Christmas carol. The song is not to be confused with Robert Burns` Green Grow the Rushes, O, with which it shares only the title. It is cumulative in structure, with each verse built up from the previous verse by appending a new stanza. The first verse is: