The short-lived folk rock quintet Trees, formed in London in 1969, consisted of Celia Humphris (vocals), Bias Boshell (vocals, bass, guitar), Barry Clarke (guitar), David Costa (guitar) and Unwin Brown (drums). At the height of the folk rock boom, they received a lot of positive press attention early on thanks to numerous appearances as the opening act at major universities and colleges. As the top act at the St. Ives Art Festival in early 1970, they also attracted the interest of music journalists in attendance, which ultimately earned them a record deal with the major label CBS. In the spring of 1970, they recorded their first album, The Garden Of Jane Delawney, produced by Tony Cox at Chelsea's Sound Techniques studios, which was released in April.

Their folk rock, consisting of elements traditional British folk and parts of their own compositions, differed from the music of other representatives of the genre, in particular through the use of heavy lead electric guitar, which added its own progressive and psychedelic touch to guitar-driven folk rock. This novel mixture was later referred to as acid folk. Despite nationwide tours, their debut album and the follow-up LP released shortly afterwards in January 1971 went largely unnoticed at the time and did not sell particularly well, leading to Trees disbanding in the same year. However, the original English pressings of both albums are now in high demand.