Aroma is an important part of the cannabis-smoking experience, and terpenes are responsible for the smells that make each strain unique. Limonene is one of the most common terpenes in the cannabis plant, and it’s often associated with citrusy, fruity aromas. While many people assume that strains high in limonene will smell like lemon, this isn’t always the case. In order to find strains that are high in limonene, you’ll need to find lab-tested products. Limonene occurs in trace amounts in the cannabis plant, generally less than 2%. However, despite its low concentration, it’s an important part of the aroma and flavor profile of many strains.