The Truth About Cannabis Aromas

Is Poop Your Favorite Cannabis Aroma?

As customer are becoming more educated, they are looking past THC percentages when shopping for flower. Aroma is quickly emerging as one of the most important signals of quality, experience, and consumer preference. A recent scientific study set out to answer a simple question: How do we actually describe what cannabis smells like in a consistent, meaningful way?

The researchers developed the first structured aroma language for cannabis by analyzing nearly 100 flower samples. What they found challenges some long-held assumptions across cultivation, retail, and marketing.

First, THC has no smell.

Second, terpene percentages don’t reliably predict how cannabis actually smells. Outside of a few exceptions, terpene data failed to map cleanly to real-world sensory perception.

What the study identified is that there are four dominant aroma categories that consistently showed up when trained evaluators smelled cannabis flower:

1. Fruity / sweet — berry, candy-like, approachable aromas.
2. Citrus / chemical — sharp, bright, sometimes synthetic-leaning notes.
3. Cheesy / vomit / fecal — the most shocking category, but a statistically real one.
4. Funky / earthy / woody / fuel — classic cannabis “funk” with depth and heaviness.

The fact that one of the categories genuinely overlaps with scents people associate with cheese, decay, or even feces doesn’t shock true cannabis connoisseurs. It helps explain why certain strains are described as “loud,” “gassy,” or “funky”.

The study also found meaningful differences between product types. High-THC flower leaned more toward skunky, earthy, and musty aromas, while high-CBD flower was more likely to smell citrusy, sweet, or chemically clean. This suggests aroma is influenced by more than just cannabinoid dominance.

One of the biggest takeaways for operators and brand leaders: aroma perception is shaped by compounds beyond standard terpene lists. Certain volatile sulfur compounds appear to play an outsized role, yet they’re rarely discussed or tested for in commercial cannabis.

Cannabis is following the same path as wine, coffee, and craft beer, moving from lab stats to sensory experience as the real differentiator. More and more consumers are shopping with their nose vs. terpene charts.

Brands that learn how to talk about aroma clearly, honestly, and consistently will have a major advantage as the market matures. Potency may get attention, but smell is what sells the story.