Listen to O Fir Tree Dark online. O Fir Tree Dark is an English language song and is sung by Bing Crosby, Victor Young And His Orchestra and Ken Darby Singers. O Fir Tree Dark, from the album Vintage Christmas No. 2 - LP: Christmas Greetings!, Bing Crosby, was released in the year 2010. The duration of the song is 2:52. Download English songs online from JioSaavn.