Watch the episode · 3:59Almost every plant you have ever grown has a grandmother from these mountains. Short, stocky, fast to finish and covered in resin, the plants we now call indica trace back to one corner of Central Asia. And the original is now in trouble.
The Hindu Kush ▶ 0:27
Afghanistan: high, dry, with brutal winters. Central Asia has a cooler, drier climate and a short growing season, and over thousands of years the plants there adapted. Think of a plant packing for a weekend, not a month: grow fast, flower early, finish before the cold.
For generations, farmers here grew these plants for sieved hashish: the resin glands, shaken from dried plants. So, generation after generation, resin-rich plants were the ones worth keeping.
Source · McPartland & Small, PhytoKeys (2020)
The Afghan blueprint ▶ 1:05
In 2020, two botanists examined 1,100 herbarium specimens and gave this group a proper name: afghanica. Its blueprint: usually under 2 metres, with stiff branches, broad, dark, overlapping leaves, and compact flowers.
Source · McPartland & Small, PhytoKeys (2020)
Next to the tall, narrow-leafed plants of South Asia it is shorter, broader in the leaf, and it finishes earlier. Even the smell differs: acrid and skunky rather than herbal or sweet.
| Afghanica | South asian | |
|---|---|---|
| Height | usually under 2 m | usually 2 m or more |
| Leaves | broad, dark, overlapping | long, narrow, lighter |
| Finishes | earlier | later |
| Aroma | acrid, 'skunky' | herbal or sweet |
That aroma has a chemical signature. In a 2004 study of 162 plants, Afghan plants stood apart, with relatively high levels of guaiol and eudesmol, two woody-smelling compounds. (More on how aroma is inherited in same strain, different smell.)
Source · Hillig, Biochem. Syst. Ecol. (2004)
The hippie trail ▶ 1:52
Through the 1960s and 1970s the overland hippie trail ran through Kabul, and travellers came home with seeds in their pockets. Afghan seeds reached California and Europe. Then, in 1979, war closed the route.
The overland 'hippie trail' runs through Kabul
Afghan seeds reach California and Europe
War closes the route
For breeders it was a gift. Crossed into tall, slow tropical lines, Afghan genetics brought compact size and an earlier finish, ideal under indoor lights. It became the chassis breeders built on: Skunk #1, for example, is usually described as Afghan crossed with Colombian and Mexican lines.
The twist: is your Afghani really pure? ▶ 2:35
The same 2020 study concluded that fifty years of widespread crossbreeding has blurred the old differences. Most indicas and sativas sold today have undocumented hybrid backgrounds.
Source · McPartland & Small, PhytoKeys (2020)
And names are a poor guide. A 2015 study genotyped 81 drug-type samples and found that strain names often do not reflect a meaningful genetic identity, like a family recipe passed through so many kitchens that the name stayed but the ingredients changed.
Source · Sawler et al., PLOS ONE (2015)
Back in Central Asia, the authors describe the original landraces as critically endangered reservoirs of genetics, in urgent need of conservation. Saving their seeds is how the blueprint survives. (See landraces: where cannabis seeds came from.)
Source · McPartland & Small, PhytoKeys (2020)
Afghani is the original Central Asian "indica": short, broad-leafed, early and resinous. Travellers carried it west in the 1970s, and today's Afghani is often a hybrid. Whether "indica" means anything at all is the subject of indica vs sativa: what the DNA says.
Sources
- McPartland, J.M. & Small, E. (2020). "A classification of endangered high-THC cannabis (Cannabis sativa subsp. indica) domesticates and their wild relatives." PhytoKeys 144: 81–112.
- Hillig, K.W. (2004). "A chemotaxonomic analysis of terpenoid variation in Cannabis." Biochemical Systematics and Ecology 32: 875–891.
- Sawler, J. et al. (2015). "The Genetic Structure of Marijuana and Hemp." PLOS ONE 10(8): e0133292.
Every claim in this article comes from the episode script, which is checked against these papers. Prices on Seedscanner are dated observations; this page is not growing or legal advice.
