Why Does So Much Weed Taste the Same Now?

Watch the episode · 3:56

Thousands of strain names, so why does so much of it taste the same? Scientists pulled lab results for nearly 90,000 samples from six US states, sold under more than 3,000 strain names. The chemistry told a much simpler story than the names. And the surprising part is that it isn't because modern plants are all genetically alike.

Source · Smith et al., PLoS ONE (2022)

Thousands of names, two smells ▶ 0:38

Start with the obvious one. 96.5% of those samples were THC-dominant. CBD-rich and balanced plants together made up less than 4%.

Next, flavour. Much of what you taste is actually aroma, and it comes mainly from compounds called terpenes. When the scientists grouped the THC-dominant samples by their terpenes, more than 3,000 names collapsed into just three main smell groups. Two of them held 87% of the THC-dominant samples.

Source · Smith et al., PLoS ONE (2022)

Group one: caryophyllene and limonene, peppery and citrus. Group two: myrcene and pinene, earthy and piney. The fresher, fruitier terpinolene group was the small one.

Some names were consistent: 96% of Purple Punch products landed in the peppery citrus group, and most Blue Dream in the earthy pine one. But a name alone often told you little.

The twist ▶ 1:25

So did modern breeding throw the variety away? Not in the way you'd think. Modern strains are mixed from many parents, so genetically they're surprisingly varied. In one comparison, commercial cannabis was actually more mixed than old landraces. But at some key spots in the DNA, the modern cultivars studied all carry the same version. Those spots are fixed in modern lines, but still varied in landraces.

Source · Babaei & Torkamaneh, Plant Genome (2026)

A 2025 study of 193 cannabis genomes found the same pattern at the heart of it. The species is surprisingly diverse overall, but the genes that make THC and CBD show very little variety: domestication narrowed them down to a few working versions.

Source · Lynch et al., Nature (2025)

What landraces keep ▶ 2:09

Landraces are local strains shaped by one place over generations. A 2026 study of 145 Iranian landraces found three distinct groups, shaped by geography, climate and traditional farming, and rare gene versions often missing from commercial lines. They're adapted to their home, not stronger everywhere.

Source · Babaei & Torkamaneh, Plant Genome (2026)

Then there's rare chemistry, like THCV, a cousin of THC with a shorter tail. The 2025 genome study linked it to a small set of genes, and plants high in these varin cannabinoids have been reported from southern Africa and parts of Asia. Durban Poison may be one.

Source · Lynch et al., Nature (2025)

Bringing it back ▶ 2:52

So can breeders bring that variety back? It happened because breeders chased what the market rewarded: high THC. Now DNA markers let breeders find rare traits in seedlings, and landraces are the place to look for them (here is how a new strain is made).

And your move? Look past the name. In the big study, sorting samples by their dominant terpene matched their chemistry far better than the indica or sativa label.

Source · Smith et al., PLoS ONE (2022)

So if you want something different, read the terpenes, not the name.

96.5% of lab samples were THC-dominant, and two smell groups held 87% of them. Modern strains are mixed, but a few key spots are fixed, and landraces keep the rare versions. The dominant terpene tells you more than the strain name.