What is the ruling on planting or placing a tree branch on a grave, following the action of the Prophet (peace and blessings be upon him)?

Question:
This questioner asks: Is it prescribed for a Muslim, when he goes to visit a grave, to plant or place a tree branch on this grave, following the action of the Prophet (peace and blessings be upon him)?

Answer:
This is specific to the Messenger (peace and blessings be upon him). He saw two graves and said, "They are being punished, and they are not being punished for something great. As for one of them, he used to spread talebearing, and as for the other, he did not ensure cleanliness from his urine." Then he took two green branches and said, "Perhaps it will be lightened for them as long as they do not dry out." This is specific to the Messenger (peace and blessings be upon him). Yes, we do not know about the dead whether they are punished or blessed, but Allah may reveal to the Messenger something of that. Yes.