The ruling on placing trees on a grave after burial

Question:
May Allah reward you, Honorable Shaykh. This questioner asks about placing trees, and also alfalfa or some kind of tree, on the grave after the deceased is buried. He says this custom is widespread among us and in our country.

Answer:
This is a bid'ah (religious innovation). This is a bid'ah and it is not permissible. No tree is to be placed on the deceased, no tree is to be planted on it, no alfalfa is to be placed on it, and nothing is to be placed on it. Rather, the Muslim should make du'a' (supplication) for him and give charity on his behalf. This is what benefits the deceased. As for placing vegetables, alfalfa, or trees on his grave, this is a bid'ah, and every bid'ah is misguidance.
Yes. The Prophet (peace and blessings be upon him) planted a fresh branch on a grave, or on two graves, and said, "Perhaps it will lighten their burden as long as it does not dry out." This is specific to the Messenger (peace and blessings be upon him), as evidenced by the fact that the Companions (may Allah be pleased with them) did not do this. If it had been a sunnah (recommended practice) of his, the Companions (may Allah be pleased with them) would have done it. This is specific to the Messenger (peace and blessings be upon him). Allah is the Greatest. He is the one who knows, and He is the one whom Allah informed that the two graves were being tormented. As for us, we do not know what is in the two graves, and it is not for us to place anything on them and claim that it lightens their torment. Yes.