In Korean tradition, dreaming of autumn is read as auspicious. It is most often tied to 재물, 전반.
Autumn and harvest are the season of reaping. Coloured leaves were read as a fine conclusion; falling leaves, a season ending and time to tidy up.
Tradition reads the symbol as an omen; psychology reads the same dream as a mirror of your present state. Describe your dream and both readings appear together. Interpret your dream