Throwing plant ashes on the head in the dream means that the dreamer is going through a period of transition or change. Plant ash is the ashes produced by fallen leaves and plants, which represents the destruction and dissipation of life. Therefore, this dream may imply that the dreamer needs to end a period of life or experience and enter a new stage.
This dream may also be related to the psychological state of the dreamer. Plant ash is a product of decay, and it may represent the unhealthy state of the dreamer's emotions or thoughts. This dream tells the dreamer that he needs to clean up and process his emotions and thoughts in order to regain his vitality and energy.
If the dreamer feels anxious or worried in the dream, this dream may also imply that something inevitable will cause him uneasiness. At this time, the dreamer needs to face his predicament rationally, control his emotions, and actively seek help.
Plant ashes may also represent the dreamer’s memories of his or others’ past. This dream may suggest that the dreamer needs to learn to release past bad emotions and resentments so that he can grow further.
In some cultures and religions, ashes also represent finality and death. This dream may imply that the dreamer needs to arrange his or her life plan, cherish the time in front of him, and not ignore the meaning and value of life.
In short, this dream has no specific reference or prediction, and can only be analyzed based on the specific situation of the dreamer. If the dreamer thinks this dream is very important, he might as well think more about it, find out the inspiration he needs and put it into practice.