Is it permissible to plant trees on graves? Likewise, to build a wall or a boundary wall around the graveyard, whilst there are still graves in the four corners?
There is no harm in building a boundary wall for the protection of the graveyard. If the tree is being planted with the intention of giving shade to those who visit, then this is commended, as long as it is planted away from the grave.
And Allah ﷻ knows best.
And Allah ﷻ knows the best
Imam Ahmad Rida Khan رحمة الله تعالى عليه
Translation by Dr Musharraf Hussain Al-Azhari Translator of Majestic Quran, www.majesticquran.co.uk