The ruling on reciting Surat Ya-Sin at the Grave and the ruling on planting Trees over and cultivating it with Vegetation

Question :

After burying the deceased some people recite Surat Ya- Sin from a copy of the Qur'an at the grave and they plant a tree at the grave, like an Indian fig tree, and they will plant some barley or wheat in the ground over the grave. They do this claiming that the Messenger did that to two graves of his Companions. What is the ruling on that?

Answer:

It is not legislated to recite Surat Ya-Sin or anything other than it from the Qur'an over the grave after the burial or during the burial. It is also not legislated to recite Qur'an in the graves, because the Prophet did not do that, nor did his Rightly-Guided Caliphs. Likewise, it is not legislated to call the Athan or the Iqamah in the grave. All of that is innovation. It has been authenticated from the Messenger that he said:
"Whoever does a deed that is not in accordance with our matter, then it is rejected."

This was recorded by Imam Muslim in his Sahih. Likewise, it is not legislated to plant trees over the graves or Indian fig trees or anything else. Also, barley and wheat and other things should not be planted over the graves. This is because the Messenger did not do that over the graves, nor did the Rightly-Guided Caliphs. In reference to what the Prophet did with the two graves, which Allâh had informed him about their torment, of planting a palm branch in them, this is something specifically for him and those two graves. This is because he did not do that with anyone other than them. It is not for the Muslims to introduce new things from the acts of seeking nearness to Allâh that Allâh did not legislate. This is due to the Hadith that has been mentioned and the Statement of Allâh:
"Or do they have partners who have legislated for them from the religion that which Allah has not allowed?"

And success is from Allâh.

Source:
Ash-Shaykh Ibn Baz
Fatawa Islamiyah, Vol. 3 Pages 116-117