Abstract The spacetime solution for a black hole, surrounded by Grass Strimmer Blade an exotic matter field, in Rastall gravity, is calculated in an arbitrary d-dimensional spacetime.After this, we calculate the scalar quasinormal modes of such solution, and study the shift on the modes caused by the modification of the theory of gravity, i.e.
, by the introduction of a new term due to Rastall.We conclude that the shift strongly depends on the kind of exotic field one is studying, but for a low density matter that supposedly pervades the universe, it is unlikely that Rastall gravity will cause an instability for English Longbow the probe field.