Cannabis product labels contain a wealth of information, but they can be confusing if you do not know what to look for. Understanding how to read these labels is essential for making informed purchasing decisions and ensuring you get what you pay for.
THC and CBD Percentages
Total THC vs. THC
You will often see two THC numbers on labels:
- THC (Delta-9 THC): Active, decarboxylated THC already present
- THCA: Raw precursor that converts to THC when heated
- Total THC: Calculated as THCA x 0.877 + THC , the maximum THC after decarboxylation
For flower, Total THC is the number that matters. For edibles and tinctures, the THC number is what counts.
CBD Content
CBD follows the same logic (Total CBD = CBDA x 0.877 + CBD). High-CBD strains contain 8-25% CBD. Learn more in our CBD oil benefits guide.
Why Higher THC Is Not Always Better
The overall experience depends on the terpene profile and entourage effect. A well-grown 20% THC flower with rich terpenes often beats a poorly grown 30% THC flower.
Terpene Profiles
Premium products include terpene testing. Look for dominant terpenes listed by concentration, total terpene percentage, and individual terpene breakdowns.
Lab Testing Results
Legal markets require third-party testing for:
- Potency: THC, CBD, and minor cannabinoids (CBG, CBN, CBC)
- Pesticides: Harmful chemical residues
- Heavy metals: Lead, arsenic, cadmium, mercury
- Microbials: Mold, yeast, bacteria
- Residual solvents: For concentrates
- Mycotoxins: Toxic mold compounds
Look for QR codes linking to the Certificate of Analysis (COA).
Harvest and Package Dates
- Harvest date: When the plant was harvested
- Package date: When packaged for sale
- Test date: When lab testing was done
Cannabis is best within 6-12 months of harvest. THC converts to CBN over time. See our cannabis storage guide.
Additional Label Information
Strain Name and Genetics
Understanding if a strain is indica, sativa, or hybrid is a starting point.
Net Weight
Common quantities: 1g, 3.5g (eighth), 7g (quarter), 14g (half ounce), 28g (ounce).
Batch Numbers
Enable traceability from seed to sale and help with product recalls.
Red Flags
- No lab testing or COA
- THC above 35% for flower (likely inaccurate)
- Missing dates
- No batch number
- Vague edible ingredients
- Outrageous health claims
Shop Smarter
Browse lab-tested products at the Ganja.com shop, and find a dispensary near you that prioritizes transparency.
This article is for informational purposes only and does not constitute medical advice. Cannabis laws vary by jurisdiction. Always comply with your local regulations and consult a healthcare professional before using cannabis products.
