The Mushroom label initially released recordings in Canada through distribution arrangements with five independent distributors.
The company was also incorporated in the United States and maintained a second office on Sunset Boulevard in Los Angeles, California.
Mushroom was distributed in the U.S. through a network of independent distributors, which included Fourth Street East in Chatsworth, California.
Heart's two Mushroom albums were purchased and re-issued by Capitol Records when the band moved to that label in 1985.
In late 2013 Linus Entertainment released several Mushroom recordings on CD for the first time including albums by Chilliwack and Doucette.
In the early 1970s Reusch sold the studio to Jack Herschorn, who appointed Mike Flicker as chief engineer and Howard Leese as program manager.