Planting flowers and trees on graves

Question:
Honorable Shaykh, in some countries, after the deceased is buried, flowers are planted on top of the grave, and sometimes an olive tree is planted next to the grave, with its fruit hanging down. What is the ruling on this?

Answer:
This is invalid and forbidden, and it is not permissible. Planting trees on graves or flowers on graves is not permissible. This is an exaggeration regarding graves, and it does not benefit the deceased. They claim that this benefits the deceased, but it does not. It is an innovated act, so it is not permissible. It is obligatory to prevent this, and whoever does it must repent to Allah and abandon this act. It is also obligatory to clarify this to the people.
And he said to him: This is a matter that is not permissible. One must not plant flowers on graves, or plant trees on them or beside them. All of this is forbidden, an innovation, and an exaggeration regarding graves. This does not benefit the dead; only their deeds benefit them. As for the trees, they are not of any benefit, and this is not from the practice of the Messenger (peace and blessings be upon him) nor from the practice of his Companions. Rather,
it is reported that he (peace and blessings be upon him) passed by two graves and said , then he asked for a fresh palm branch, split it in two, and planted one on each grave, saying, "Perhaps it will lighten their punishment as long as they do not wither." This is specific to the Messenger (peace and blessings be upon him).
The evidence is that the Companions did not do it. No one among the Companions did this. If this had been prescribed, the Companions would have done it, because Allah revealed to the Messenger the state of the two graves and that they were being punished. As for us, we do not know, we do not know about the conditions of the dead. This is specific to the Messenger (peace and blessings be upon him). Yes.