The term “cultivar” refers to a “cultivated variety.” This is a horticulture term for a plant that has been selected and modified by humans. It can be a hybrid (deliberate or not) or a wild plant that has been cultivated and is distinct enough to be named.
Sour diesel is a perfect example of a cannabis cultivar. In growing sour diesel, one must observe certain environmental factors to the letter. One known factor to consider is training the plant with “low-stress training,” a specific method designed to produce better yields.