"Grass" is a song written by Colin Moulding of the English rock band XTC, released as the lead single from their 1986 album Skylarking.

Moulding composed it on an open E-tuned guitar and found its harmonic changes by playing the chord shapes of Thunderclap Newman's "Something in the Air" (1969).

The mixing of violin and guitar was an idea lifted from John Lennon's "How Do You Sleep?"

He said Rundgren voiced concern that the effect was too close to "a molester", and so Moulding "did the Bowie thing and added an octave above it".

[2] On Skylarking, the track bookends "Summer's Cauldron" with a reprise of its "insect chorus".