Ashes are what remains after something has burned, so dream books read them as the end of a phase and the humility that follows. Old tradition also sees them as fertile ground — what is left can feed something new.
When this appeared in your dream, what were you feeling?
My Cosmic Code has a private dream journal. Write a dream down and the app picks out the symbols in it, shows what dream books say about them and, over time, which words recur across your entries. The journal is stored on your device only.