In the memoir, the getaway car (2011), writer Ann Patchett uses a gardening metaphor for creativity.
You will take bits from books you’ve read and movies you’ve seen and conversations you’ve had and stories friends have told you, and half the time you won’t even realize you’re doing it. I am a compost heap, and everything I interact with, every experience I’ve had, gets shoveled onto the heap where it eventually mulches down, is digested and excreted by worms, and rots. It’s from that rich, dark humus, the combination of what you encountered, what you know and what you’ve forgotten, that ideas start to grow - Ann Patchett.