The commercial ploy was heavily driven in psychedelic music that attempted to replicate the San Francisco Sound.

Apart from its obvious references about the use of psychedelic drugs, Ultimate Spinach is a concept album based on abstract anti-war sentiment, in the context of the Vietnam War that happened at that time.

One of the most notable characteristics is its experimental style, with "sonic artifacts" and unusual recording techniques, among which stand out a variety of guitar sounds and distortions including fuzz, echo, tremolo, feedback, volume control, and use of the wah-wah pedal.

With the publicity backing them, the band toured with prominent musical acts like Big Brother and the Holding Company and The Youngbloods at significant venues like the Filmore Auditorium.

Following their recording and initial tour, drummer Keith Lahtenein left the group to by replaced Russell Levine.