expression, noun
something that nourishes one's artistic skill
Idiomatic expression likening experiences or knowledge to fertilizer for one's art. Often used when an artist draws inspiration from life events, other arts, or study.
See also: 肥やし (こやし)
旅先での出会いが、彼の芸の肥やしになった。
Encounters during his travels became nourishment for his art.
読書は芸の肥やしだと、師匠はよく言っていた。
My teacher often said that reading is fertilizer for one's art.