G 13 Skunk Very few strains are as legendary as this combination of the famed G-13 and equally famous Skunk #1. The result is a heavy Indica with a quick flowering time and abundant yield. G 13 Skunk is one of the better medicinal strains with high CBD and THC (20%+) contents. Patients worldwide have used G 13 Skunk Strain to treat chronic pain, depression, arthritis, and multiple sclerosis. G 13 Skunk is a long lasting, narcotic like buzz that will have you staying home and enjoying pain free relaxation. Growing G 13 Skunk Marijuana Has Medical Benefits.