Believed to have originated in the Hindu Kush mountain range in Pakistan and Afghanistan, kush is a subset of strains of Cannabis indica. This strain was brought to th U.S. in 1970's and continues to be a very popular strain. The kush plants are smaller with a very distinct aroma. it can be described as sweet, earthy and citrusy. Some of the more popular strains are Mango Kush, Hindu Kush and Death Star.