Marijuana landrace strains are ones that are indigenous to a specific location. That means that they are naturally occurring in that area, and they have never been cross-bred with any other strain of marijuana. They are generally a very old strain, having been inbred throughout history over and over again. They are pure, and each plant is highly similar to each other. Generally speaking, a landrace will either be completely indica or completely sativa. Back in the 1960s and 1970s, landraces were the only available product on the market.

Landrace strains used to be the most sought-after strains in the world, offering a vast array of different strain options to people who traveled the world in search of new strains of marijuana. Plants from the Hindu Kush mountain range stretching through Pakistan and Afghanistan produce the pure indica Afghan. What grew in the volcanic soil of Hawaii was entirely different from the Nepalese temple strains, as well as the Lebanese Red, Moroccan Kif, Chocolate Thai, Red Congolese, and the various golden strains in Mexico and Colombia.

Heirloom strains of marijuana refer to the strains of cannabis landrace that were cultivated in Northern California and Hawaii.

Landraces have come from the most effective breeder of them all: natural selection. The genetic variability between different kinds of landraces makes these strains much more desirable for many people.

*Cultivating and consuming landraces and heirloom strains often have more types of chemical compounds too.