Packaging & Labeling Requirements

Why Packaging Matters

Maine takes packaging seriously. The rules exist to protect children, inform customers, and prevent overconsumption. Violations carry fines. Repeat issues risk your license.

Your packaging also affects whether customers trust your products. Clean, compliant packaging with clear information builds confidence. Sloppy or confusing packaging does the opposite.

Child-Resistant Packaging

All cannabis products sold in Maine must use child-resistant packaging. This applies to every product type. Flower, concentrates, edibles, topicals, and tinctures all need it.

Child-resistant does not mean child-proof. It means the packaging requires some effort to open. Think push-and-turn caps. Think blister packs. Think sealed pouches with difficult openings.

The OCP follows federal standards for child-resistant packaging. Products that come from out-of-state manufacturers must also meet these standards before sale in Maine.

Opaque Packaging Rule

When a customer leaves your store, the product must not be visible through the packaging. This means no clear containers. No windows. No see-through pouches.

This rule protects everyone. It prevents accidental exposure for children who might see cannabis products in a car or on the street. It also prevents theft. Products in opaque packaging attract less attention.

What Labels Must Say

Every label needs certain information. Maine law specifies what goes on each package.

Product Identity

The product name and strain or type must appear on the label. For edibles, this includes the product description like "Brownie" or "Gummy."

THC Content

Labels must show THC content per serving and per package. This must match what the lab reported on the COA. If the test shows 50mg total THC, the label must say 50mg. Variations beyond acceptable margins require relabeling.

Batch Information

Every package shows the batch number, harvest date, and production date. This ties back to Metrc records. If there is a problem with a product, this information lets you trace it.

Required Warnings

Labels must display two warnings. One says "Keep out of reach of children." The other says "For adult use only." These must be prominent. They must be legible.

Edible-Specific Rules

Edibles face additional requirements in Maine.

Each serving of an edible cannot exceed 10mg of THC. A package might contain multiple servings. The label must show both per-serving and total package THC content.

Edibles cannot look like candy or brand-name food products. This prevents accidental ingestion by children who might mistake cannabis edibles for regular treats. The OCP checks this during product review.

Ingredients and allergen information must appear on edible labels. Customers with allergies need this information. It must be accurate and current.

Labeling Best Practices

• Print legibly. Small fonts fail inspection.
• Use permanent ink. Labels that smear create compliance issues.
• Include your dispensary name and license number.
• Add a QR code linking to lab results if your lab provides one.
• Check label accuracy before applying. Wrong THC numbers create violations.
• Store labels properly. Heat and moisture damage them.

Common Packaging Violations

The OCP inspects packaging during routine compliance checks. The most common violations operators encounter:

• THC content mismatch. Label says 50mg but COA shows 45mg. This is a relabeling situation, not a warning. Get products retested if numbers don't match.
• Illegible warnings. Text too small, font unclear, or ink that fades when wet. Print specs matter.
• Missing batch numbers. The connection between packaging and Metrc records is mandatory. No batch number means no sale.
• Serving size confusion. For edibles with multiple servings, the per-serving THC must be clearly distinguished from the per-package total. Customers have sued over unclear edible dosing.
• Child-resistant failures. If a packaging supplier's certification expires, your inventory may not be compliant. Keep certifications current.

Maine's packaging inspectors have shut down at least two dispensaries temporarily in 2025 for packaging violations. These were not intentional — the operators didn't catch the issues before inspection. This is why pre-sale compliance checks matter. See our Marketing Compliance Guide →

Sourcing Compliant Packaging

You can buy packaging from licensed manufacturers or third-party suppliers. The packaging must meet OCP standards. Ask suppliers for documentation that proves child resistance.

Some operators use generic packaging and apply their own labels. This works if the base packaging meets requirements. Verify before you buy.

Maine-based suppliers worth contacting: GreenWay Packaging (Portland), Coastal Packaging (Brunswick), and BioPharma Solutions (Lewiston) all supply compliant cannabis packaging in Maine. Expect to pay $0.35–$1.20 per child-resistant pouch for flower packaging. Edible containers run $0.50–$2.00 per unit depending on size and design.

If you source from out of state, confirm the packaging meets Maine's specific child-resistant standards — federal certification is accepted but Maine OCP may require additional documentation. Keep all receipts and certifications on file for inspection.

Packaging and Product Testing

Packaging and testing are connected in Maine's compliance system. A product cannot be sold without passing testing, and the test results must match what the label says.

When you receive packaging, verify it before product goes in. A batch that passes testing but gets packaged in non-compliant containers creates a recall situation. This costs money and creates compliance risk.

The COA (Certificate of Analysis) is your reference document. The THC percentage on the COA must match the label. If you repackage bulk flower, recalculate total THC per package based on the flower weight and COA percentage. A 3.5-gram package at 18% THC contains approximately 630mg of THC total. The label should reflect this.

Label Design Specifications

Maine doesn't specify exact font sizes for most label text, but the OCP uses "reasonable legibility" as its standard. What passes inspection:

• Warnings in minimum 10pt font, high-contrast colors
• THC content clearly separated from marketing claims
• Dispensary name and license number in 8pt or larger
• Batch information readable without magnification

What fails inspection:

• Marketing text overlapping required warnings
• THC content in decorative fonts that are hard to read
• Labels that smudge when damp (common with inkjet-printed labels)
• Fine print that requires a loupe to read

Thermal transfer printers produce the most durable labels. The upfront cost ($200–$400 for a good model) beats replacing labels that fail in humid storage or during handling.

OCP Inspection Data and Enforcement Trends

The OCP completed 1,247 total inspections of Maine cannabis licensees in 2023. Packaging and labeling violations accounted for approximately 18% of all citations — making them the third most common compliance finding after inventory tracking errors and security violations.

According to OCP's annual compliance report, the most frequently cited packaging violations in 2023 and 2024 were:

Industry analysts note that packaging violations are particularly costly because they typically trigger product holds — the affected inventory cannot be sold until the violation is corrected. A single batch of 500 units with an incorrect THC label represents millions of dollars in lost revenue during the hold period. Beyond the direct cost, repeated packaging violations signal to the OCP that a licensee has systemic quality control problems, increasing inspection frequency and scrutiny on all future applications.

Packaging for Different Product Types

Maine's cannabis market encompasses multiple product categories, each with distinct packaging requirements. Understanding the specifics for each type prevents compliance errors that can halt sales.

Flower and Pre-Rolls

Flower packaging must accommodate moisture control, odor containment, and child resistance simultaneously. The most common compliant format in Maine is a flat, child-resistant pouch with a ziplock or push-button closure. These pouches are opaque, resealable, and can be customized with labels. Pre-rolls are typically packaged in tubes or multi-pack boxes, both of which must meet child-resistant standards and contain no visible product through the exterior.

For infused pre-rolls (twax-headed or dipped), additional potency labeling is required. The label must show the THC content of the infusion separate from the flower base. A common error is labeling only the flower weight without accounting for the concentrate coating — this results in a THC mismatch when the COA and label are compared.

Concentrates

Concentrates — including shatter, wax, live resin, rosin, and hash — present unique packaging challenges because small amounts represent high doses. Maine requires concentrates to be packaged in child-resistant containers that prevent easy access. The label must display the total THC content of the package, not just the percentage. For example, a 1-gram cartridge of 75% THC concentrate contains approximately 750mg of total THC — the label should reflect this total.

Edibles

Edibles require the most complex labeling of any cannabis product category. Beyond standard product identity and THC content, Maine requires: ingredient lists with allergen declarations, a statement that the product is an edible cannabis product, net weight in both metric and US customary units, and a "made in Maine" or "manufactured in Maine" statement if applicable. OCP regulations prohibit edibles from resembling any existing non-cannabis branded food product — a rule enforced to prevent accidental ingestion by children who might mistake a cannabis chocolate bar for a Hershey's bar.

Infused beverages require specific formatting: the word "cannabis" must appear adjacent to the product name, not buried in the ingredient list. The serving size for beverages is defined as the entire container unless the container is clearly subdivided into distinct servings — in which case the per-serving THC and total servings must both appear on the label.

Topicals and Tinctures

Topicals — creams, balms, and lotions infused with cannabis — are not intoxicating and are not subject to the same serving size limits as edibles. However, they still require full product labeling including THC content (for transdermal THC absorption purposes), all ingredients, and required warnings. Tinctures are liquid products typically administered sublingually; they are subject to the 10mg THC per-serving limit if they are marketed for ingestion, even if the delivery method is oral.

Key Citations

• M.R.S. Title 28-B, Section 701 — Product labeling requirements
• M.R.S. Title 28-B, Section 703 — Health and safety requirements for cannabis products
• M.R.S. Title 28-B, Section 702 — Packaging standards
• OCP Adult-Use Cannabis Program — Licensing and compliance guidance
• OCP Resources Page — Forms, guidance documents, and inspection procedures

Key Takeaways

• Child-resistant packaging is required on all Maine cannabis products without exception
• Packaging must be opaque at point of sale exit — no visible product
• THC content on the label must match the COA within acceptable variance margins
• Required warnings must be prominent, legible, and in correct font size
• Edibles are capped at 10mg THC per serving with clear per-serving and per-package totals
• Batch numbers, harvest dates, and production dates must appear on every label
• Edibles cannot resemble brand-name non-cannabis food products
• Thermal transfer printers produce the most durable, inspection-ready labels

Frequently Asked Questions