How to read a cannabis lab report

Every product we ship has been tested by an independent Canadian lab, and every report is available on request. That report is short, but it is packed with useful information that most shoppers never look at. Here is how to make sense of it.

Start with the potency panel, then move on

THC and CBD percentages are the numbers on the package, and they are also the least useful. A 24% flower and a 26% flower will not feel meaningfully different to most people, and potency says nothing about how the flower was grown, cured or stored.

Use potency as a rough guide to dose, not as a ranking of quality.

Terpenes tell you what it will feel like

This is where the interesting data lives. Myrcene tends to lean sedating, limonene lifts the mood, caryophyllene is the one people reach for when they want something for physical tension. Total terpene percentage matters less than which ones dominate.

If a strain worked well for you, note the terpene profile. That is a far better predictor of whether the next bag will suit you than indica or sativa on the label.

Moisture and water activity

Good labs report both. Flower below roughly 0.55 water activity is usually dry and harsh, and above 0.65 it can mould in the jar. Most quality producers land in the middle. This single line tells you more about how the flower will smoke than any marketing claim.

The contaminant screens

Look for pesticide, heavy metal, microbial and mould results all marked as passed or below the limit of quantification. Any blank field is worth asking about. A missing test is not the same thing as a clean test.

Ask for the report

If a shop cannot produce a current certificate of analysis for a specific lot, that is your answer. We keep ours on file per batch and are happy to send one along with your order.

The short version

Buy on terpenes, care about water activity, glance at potency, and always ask to see the contaminants panel. Everything else is packaging.