Is it permissible to make a vow to place flowers or a garland on the grave of a Wali of Allah ﷻ or a martyr?
Such a vow is not classed as a vow in the Sacred Law’s terminology aand hence will not come under this category.
Yes, placing flowers is commended and to place a garland on the blessed graves of the Awliya for blessings is also a commendable act.
And Allah ﷻ knows best.
Imam Ahmad Rida Khan رحمة الله تعالى عليه
Translation by Dr Musharraf Hussain Al-Azhari Translator of Majestic Quran, www.majesticquran.co.uk