Aroma is usually one of the first things people notice about cannabis, and it doesn't come from cannabinoids alone. Terpenes do most of the work in how a strain smells and how the whole thing comes across.
What Are Terpenes?
Terpenes are aromatic compounds found in a lot of plants, cannabis included. They're behind smells like citrus, pine, flowers, and earth. In cannabis, the terpene mix changes a lot from one cultivar to the next.
Why Aroma Differs Between Products
Two products with about the same cannabinoid levels can still smell and feel totally different because of their terpenes. These compounds give each product its character without changing the potency.
Terpenes and Environmental Sensitivity
Terpenes are delicate and break down when they hit light, air, or heat. Research on terpene stability, including this review of terpene behavior in plant compounds , shows how quickly aroma can shift over time.
Why Storage Affects Terpene Retention
Storage has a lot to do with how well terpenes hold up. Airtight containers, low light, and steady temperatures all slow the aroma loss and keep things consistent.
Understanding Aroma Over Time
As cannabis ages, terpene levels tend to drop off, which changes the smell even if the flower is still fine to use. That ties directly into shelf life, which we get into in our guide on how cannabis shelf life changes over time .
Terpenes give cannabis its sensory identity. Once you get what they do, it's a lot clearer why products differ and how time and handling change aroma.