Lawn

THALASSA

Hi
Our 4 yr old lawn has developed these 3 darker and thinner ring like patterns. Has anybody any idea what has caused this please? 
Thanks,
Dominic.

mrtjforman

alien crop circles

AnniD

Assuming the aliens didn't turn up, it may be this 

https://www.lawnsmith.co.uk/topic/pests-diseases/fairy-rings

THALASSA

Thanks very much.