Q: is it permissable to put flowers on a grave? I hve heard that it is makrooh because it is biddat
A: It is not permissible to place flowers on a grave because this is not established from any Hadeeth or practice of the Sahaabah. Furthermore, it is also a practice of the Nasaara in our times. It is therefore, Haraam and bid’ah to place flowers on the grave. However, it will be permissible to place a dry twig or branch on the grave, but this should be done once only, not on a continuous basis.
And Allah knows best
Mufti Siraj Desai