“It’s a race against time,” notes our “Guru of Ganga” Ed Rosenthal. Ed and his wife are in the  Himalayas –  the  highest mountains in the world – looking for Landrace strains before hybridization erases their genetics forever. Despite the environment he’s in somehow Ed  found a way to send us an update and photos. It’s hard not to come away more impressed than ever by this man’s energy and commitment to keep us up-to-date with the most reliable, scientific information out there about the colossal threats right now to the cannabis plant. The photo (by Jane Klein) that you see here is Ed with his phenohunt host Abhishek from the Cannabis Seed Breeding Project. 

Why Landraces Are Important: The Search for Himalayan Cannabis Genetics in India. By Ed Rosenthal.

Cars and cannabis have one similarity that isn’t immediately obvious: new models appear constantly. Today’s seed bank menus are filled with varieties that didn’t exist a few years ago, while many older strains have faded into obscurity. But when you look at the Phylos Galaxy, which maps genetic relationships, almost everything on the market today is closely related—descendants of earlier hybrids crossed and re-crossed for the last 50 years.

Just read any strain description: “a cross of this x that.”Genuine introductions have been rare. Autoflowers are one exception owed largely to Nevil Schoenmakers’ expedition to Romania where he collected Cannabis ruderalis. Those plants became the backbone of today’s auto-flowering genetics, maturing reliably 75–90 days after germination.

Cannabis Evolution And The Importance Of Origin Diversity
A core principle of evolution is that species show the greatest diversity where they originated. Modern potatoes are a classic example: today’s cultivars derive from wild potatoes native to Peru and Bolivia, but only a fraction of the available genetics were used to create commercial varieties. When new diseases emerge, researchers return to wild populations to find resistant genes.

Cannabis follows the same evolutionary logic.
It is widely theorized that cannabis originated in the Himalayan foothills, in what is now western China. Its closest living relative is hops. One theory suggests that before the species diverged, a perennial ancestor grew in a mild climate. As tectonic activity built the Himalayas and the region cooled, the plants adapted in two different ways:

  • Hops remained perennial, dying back aboveground each year while the roots overwintered.
  • Cannabis evolved into a mostly dioecious annual, dropping seed each fall—although in milder climates, cannabis can overwinter.

The Search For Wild And Semi-Feral Landrace Cannabis In India
Because China’s side of the border is difficult to explore, the most realistic access to ancient cannabis diversity lies in India, Nepal, and Bhutan, which border the same Himalayan zone. My wife, Jane Klein, and I are traveling through the rugged Himalayan foothills in Uttarakhand and Himachal Pradesh, two northern Indian states rich in indigenous cannabis. We joined local researcher Abhishek Bourai, who has spent years locating and documenting semi-feral cannabis populations.

At 9,000 feet (2,700 meters), some villages are reachable by car, but many sites require long hikes or mule travel. Both methods are tough for urban people like Jane and me, but the mission—to find unpolluted landrace cannabis—is worth the effort.

Cannabis is a common weed here. It grows along roadsides, footpaths, and in hidden terraced plots. Flower cultivation is illegal, so villagers—much like growers in California’s Emerald Triangle decades ago—plant in remote, hard-to-reach areas where authorities have difficulty enforcing bans.

Because this region lies relatively close to cannabis’ point of origin, each patch shows tremendous genetic variability. In an earlier pheno-hunt near Bareilly—a more populated and less rugged area—we found semi-feral patches with:

  • both indica-leaning and sativa-leaning plants
  • bushy, low-spreading forms
  • tall, narrow-leafed plants
  • a wide mix of terpene and cannabinoid expressions

In the more remote mountain regions, we’ve seen mostly plants with looser, elongated buds, reminiscent of Dr. Grinspoon-type heirloom sativas. Their flowers stretch along the branch tips rather than forming dense cluster buds. Only a small percentage show the compact, resinous bud structure associated with modern western hybrids. This genetic purity is exactly what makes landrace cannabis so important. These plants have not been contaminated by decades of western-bred hybrids.

I witnessed a similar transformation in Morocco decades ago. Before heavy European influence, Ketama-region cannabis was:

  • single-stemmed
  • low potency
  • ripening in late August

As western hash buyers arrived, they brought seeds from commercial hybrids. With widespread open pollination, Morocco’s landraces hybridized. Today, most local plants are multi-branched, stronger, and ripen in mid-September. The original Moroccan landraces now survive only in seed collections from 30–40 years ago.

This same story is unfolding across parts of India. In Malana, in the Parvati Valley, the famed Malana Cream landraces have hybridized after outside breeders—most notably Green House Seeds—distributed western genetics about a decade ago. Farmers, motivated by higher yields and stronger resin, embraced the new seeds. Today, most Malana fields contain hybrids, not the original Himalayan landraces. Our goal with these pheno-hunts is to locate and collect unpolluted Himalayan landrace cannabis before hybridization erases these genetics forever. These plants may hold:

Click HERE to read Ed’s article on edrosenthal.com where you’ll find more info and pictures of this fascinating trip to find unpolluted landrace strains.

Here’s Ed’s caption for the image at the top of the story: Here’s a phenohunt on top of the world. High in the Himalayas, I joined our guide Abhishek from the Cannabis Seed Breeding Project on a journey few ever get to make. Photo by Jane Klein