Different strains of marijuana yield different quantities of the final useable product. There are two primary types of marijuana strains, known as indica and sativa. In order to understand the different average yields, you must know the difference between the two varieties.
Indica vs. Sativa
The easiest way to classify whether a strain of marijuana is an indica or sativa is through the shape of the leaves. Indica strains are known for their wide, short leaves, while sativa strains are better recognized by their long, thin leaves. Sativa plants are better suited for outdoor growth, and some have been known to reach heights of 20 feet. Indica plants are generally shorter and denser, so they're best grown indoors. Each provides slightly different effects, as well. Sativa strains provide an energetic boost, while maintaining a cerebral high. Indica strains, however, are meant for relaxation, and are best enjoyed on the couch after a long day. Another factor that can be used to further identify an indica or sativa strain is the yield.
Indica strains generally produce higher yields, but there are exceptions to that rule. Many of the original indica strains, like OG Kush, produced smaller quantities of highly potent cannabis, but cross breeding has created a new generation of hybrid plants that have some of the best characteristics of both strain varieties.
Some of the highest yielding strains today are Dragon's Breath and Blue Dreams, both of which are sativa dominant. Other strains that produce high yields include Hawaiian Snow, Mazar, and Tangerine Kush.