What is grey mold? Grey mold is a type of fungal disease that causes blight in the cannabis crop. It is a very common occurrence and is also referred to by different names including bud rot or Botrytis cinerea. It is very easy to notice the development of this fungal infection because the buds start to acquire a different look at what is normal.Image showing buds affected by grey mold What are the properties of grey mold? Grey mold will usually thrive in summer weather as well as spring ...