Abstract: There is provided a method for enhanced extraction of cannabis oil from a cannabis plant material, and a free-flowing powder consisting of particles of cannabis plant material for use in such method. The cannabis plant material is characterized by a cannabis strain and a cannabis plant part. The method including a step of comminuting the cannabis plant material to a powder of a preselected particle size distribution (PSD) characterized by 10?Dv(90)?100 ?m as determined by laser diffraction particle size analysis prior to the extraction process, whereby the PSD is preselected in accordance with cannabis strain and the plant part.