Start with the lab report, not the product photo
An online seller of THCA flower should show you a batch specific Certificate of Analysis (COA) before you add anything to a cart. The COA is the document that states what sits inside the jar. No COA means you are buying a label.
THCA is tetrahydrocannabinolic acid. It does not intoxicate in raw form. Heat changes it. Decarboxylation removes a carboxyl group and turns THCA into delta-9 THC. That step happens when you smoke or vape the flower, and it also happens in a jar over months.
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Convenience is the sales pitch
Online THCA sellers compete on speed: same day packing, two day shipping, subscription drops, and a checkout that takes a minute. Convenience answers the how. It does not answer the what. The material inside the mailer still needs a lab report, a batch number, and a delta-9 THC figure.
Parameters to compare
1. Lab source and batch match
Look for four items on the COA: a lab name, an ISO/IEC 17025 accreditation number, a sample date, and a batch or lot ID that matches the pouch in your hand. A photo gallery of reports with no batch number tells you nothing.
- Total THCA percentage. Indoor flower sits in a wide band, often 15 to 25 percent.
- Delta-9 THC percentage. Hemp stays at or below 0.3 percent on a dry weight basis.
- Residual solvents, pesticides, heavy metals, microbials.
- Moisture and water activity.
2. Price per gram
An eighth holds 3.5 g. A quarter holds 7 g. An ounce holds 28 g. Divide the price by the gram count. A $50 eighth costs $14.28 per gram. Shipping fees, card fees, and small order charges change that figure.
3. Total THC math
Some states calculate total THC as delta-9 THC plus 0.877 times THCA. A jar at 20 percent THCA lands near 17.5 percent total THC after that math. Read the state rule, not the seller's badge.
4. Payment, shipping, and returns
Card processors restrict cannabis accounts. Sellers use card, ACH, or a payment app. Ask for the shipping cutoff, the carrier name, and the refund window in writing before checkout.
Pitfalls
- No COA, or a COA that lists a weight the product page does not.
- A hemp compliant badge with no delta-9 number.
- Prices more than half off the going rate. Trim, shake, and old flower get repackaged.
- No phone number, no street address, no return policy.
- Claims of medical benefits. The FDA has not approved the cannabis plant for the treatment of any disease.
Legal checks before you buy
The 2018 Farm Bill legalized hemp with delta-9 THC at or below 0.3 percent on a dry weight basis. THCA sits in a gap. Federal text names delta-9 THC, and THCA becomes delta-9 THC when heated. Congress has debated closing that gap. DEA states that cannabis remains a Schedule I controlled substance except for hemp as defined. Several states have moved to restrict intoxicating hemp products, and some ban THCA flower. Check your state statute and the seller's shipping exclusion list.
Questions to ask the seller
- Which lab ran the test, and is the accreditation current?
- Does the COA match the batch I will receive?
- Do you ship to my state?
- What is the age requirement? Most sellers set 21.
- What happens if the package arrives short or damaged?