Chem 91 is a cornerstone fuel strain with an unmistakable aroma of diesel, chemical funk and earth. Sour citrus, pine and spice can appear underneath the sharp gas, creating a pungent profile that has influenced generations of modern genetics.

The experience is often described as strong and cerebral at the start, with an energetic or euphoric quality that may gradually become more physically relaxing. Individual responses vary, but Chem 91 is generally considered a bold, full-presence cultivar.