A number is an excellent thing to put on a jar if you would prefer everyone to stop asking complicated questions. Bigger is better, the jar suggests. Keep moving. We have arranged the flowers in descending order of their ability to impress a spreadsheet.
This is a convenient way to sell something and a fairly ridiculous way to judge it.
Perhaps you wanted music, conversation, a little room between yourself and the day. Somehow you have arrived at a horsepower contest. The percentage has become the entire personality of the plant, and yours is apparently being evaluated by whether you can handle it.
You can decline that competition. Read the number. Then read the rest of the label.
First, find out what the number means
THC concentration matters. Higher concentrations can produce greater intoxicating effects and increase the risk of overconsumption, as the CDC explains. Treating potency as irrelevant would be another kind of sales bullshit, just wearing a nicer shirt.
But concentration is a description of the product. It is not a review, a measure of your sophistication, or a personalized prediction.
The heading beside the figure matters. “THC,” “THCA,” and “Total THC” are not interchangeable labels to collect and add together. Total THC is a calculated value that accounts for specified forms of THC and its acidic precursors under the applicable rules. The precise reporting system belongs to the jurisdiction, not to one universal American label.
California offers a concrete example. Its current rules require Total THC as a percentage for nonmanufactured cannabis goods, while an edible with serving designations reports THC and CBD in milligrams per serving and per package. Those are different units doing different jobs. California also has separate provisions for infused pre-rolls. Do not assume a flower jar, an infused pre-roll and a package of edibles are presenting equivalent figures. California DCC, sections 15700 and 17407
That is enough arithmetic for this purpose. You are identifying what has been reported, not converting a flower label into a personal consumption plan.
Strength does not produce a tidy ranking of experience
There is research behind the distinction, although it needs its qualifications attached.
A 2020 study in JAMA Psychiatry followed 121 regular cannabis users using flower or concentrates. Concentrate users had higher blood THC levels, but the researchers did not observe corresponding differences between product groups in subjective intoxication or the measured impairments. Memory and balance were affected after use.
This was a study of regular users, with people using their products as they normally would. It was not a controlled equal-dose comparison establishing that all potencies affect everybody the same way. It does not make stronger products harmless or tell a returning user what will happen tonight.
What it does provide is a useful interruption to the sales pitch: product strength, THC exposure, reported experience and measurable impairment are related questions, not four names for the same thing.
The jar has one number. The human has a history. Insisting the first can completely explain the second is asking quite a lot of a sticker.
Turn the package around
The less glamorous information deserves some attention.
For flower sold in California, the DCC's labeling checklist identifies the licensee, contact information, a unique tracking number and the date of packaging for retail sale. Those details give you a way to identify the actual package and someone responsible for it.
A packaging date is a packaging date. It does not silently become a harvest date because harvest sounds more romantic. If a seller discusses freshness, ask which date they mean. If a photo on a website shows a label, ask whether it represents the batch being discussed. An attractive stock image cannot answer that question.
Keep a picture of your own label if you want a useful record. Include the ordinary-looking identifiers. A note that says “the purple one with the bear” may preserve the mood, but it is poor filing.
And keep the distinction between identity and praise. Knowing who made something is useful. Knowing they have declared it “legendary” is mostly knowing they own a keyboard.
A lab report has a job, too
A certificate of analysis, usually shortened to COA, reports laboratory testing. California's DCC testing guidance describes batch testing that includes cannabinoid content and checks for contaminants such as pesticides, heavy metals and microbial impurities. The report records whether the batch passes or fails the relevant testing.
When a COA is provided, check that it belongs to the product and batch in front of you. A report for another batch is not a character reference that transfers by association. Look beyond the potency row, and ask the producer to explain unfamiliar terms rather than treating a page full of decimals as self-explanatory.
A passing result is evidence about the tests performed on that batch. It is not a clinical trial in your name. It cannot certify that you will feel sociable, sleep well or suddenly understand jazz.
The same boundary applies to descriptions. Aroma language, strain names and a brand's account of anticipated effects can give a product a story. They do not entitle that story to become a promise about your body.
Keep a better kind of note
If you already keep notes about cannabis, make them useful to the person who will read them later: you, with less perfect recall than you currently expect.
Record the product, batch and date. Separate what the label said from what you actually noticed. “Labeled 24% Total THC” and “I didn't enjoy the experience” can both be true without either statement needing an argument. “The company calls this relaxing” belongs in a different sentence from “I felt relaxed.”
You do not owe a famous strain a favorable review. You do not owe a high percentage your loyalty. An evening that suited you is not diminished because somebody else's label won the county fair.
Leave the number on the jar. Give the rest of the evening back to the people in the room.
Sources
- CDC — Understanding Your Risk for Cannabis Use Disorder, including the section on THC concentration.
- California Department of Cannabis Control — Text of Regulations, sections 15700 and 17407; DCC compilation includes regulations in effect October 1, 2026.
- California DCC — Non-manufactured Products in Final Form: Labeling Checklist.
- Bidwell and colleagues — Association of Naturalistic Administration of Cannabis Flower and Concentrates With Intoxication and Impairment, JAMA Psychiatry, 2020.
- California DCC — Testing Laboratories.