WeedCentralHow to Read Cannabis Product Labels
THC percentages, testing results, and what all those numbers on the packaging actually mean.
THC & CBD Percentages
These show the concentration of each cannabinoid. For flower, THC typically ranges from 15-30%. Higher THC doesn't always mean "better" — it means more intense. Many experienced users prefer moderate THC (18-22%) with a rich terpene profile over a 30%+ strain that lacks complexity.
Total THC vs. THC-A
Raw cannabis contains THC-A (non-psychoactive), which converts to THC when heated. Labels may show both. The formula: Total THC = THC + (THC-A × 0.877). This "total" number is what matters for predicting psychoactive strength.
Terpene Content
Premium products list terpene percentages. Total terpene content above 2% is considered good, above 4% is excellent. The dominant terpene (highest percentage) is the biggest predictor of the strain's aroma and effects.
Testing & Batch Numbers
Legal cannabis is lab-tested for potency, pesticides, heavy metals, mold, and residual solvents. The label should show the testing lab name and batch/lot number. If a product is recalled, this number identifies affected batches.
Harvest & Package Dates
Freshness matters. For flower, look for a harvest date within the past 3-6 months. Anything over a year old has likely lost significant terpenes. Package date is when the product was sealed — the closer to the harvest date, the better.
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