There’s been ongoing confusion in California cannabis around 2-gram rosin concentrates, specifically whether they can be sold to adult-use (recreational) customers without a medical recommendation.

Many people were told in the past that concentrates over 1 gram were medical-only, but that understanding is outdated and incomplete.

Thanks to direct clarification from the California Department of Cannabis Control (DCC), we can now clearly explain why some 2-gram rosin products are legal for adult-use, and what determines compliance under current regulations.

The Key Clarification: The Limit Is THC (Delta-9 THC), Not Total THC

Under CCR Title 4, section 17304, the adult-use limit for cannabis concentrates is based on THC (also referred to as delta-9 THC) per package, not Total THC.

This distinction matters because cannabis lab labels typically show multiple cannabinoid values, including:

• THC (delta-9 THC)
• THCa
• CBD
• Total THC (a calculated value that includes THCa conversion)

Per direct guidance from the DCC, the package limit in §17304 refers specifically to THC (delta-9 THC), not the Total THC number often highlighted on labels.

Beyond delta-9 THC and THCa, cannabis products also contain other cannabinoids that influence how a concentrate is experienced. Compounds like CBN, CBG, CBC, and THCV play a role in the overall profile of a product, which we break down further in our educational guide on minor cannabinoids.

It’s also worth remembering that THC percentage isn’t the whole story, as we explain in our THC potency guide, factors like terpene profile, other cannabinoids, and how a product is grown or processed influence the experience just as much as the numbers on the label.

What California Regulations Actually Say

Adult-Use Concentrates

• A cannabis concentrate may not contain more than 1,000 mg of THC (delta-9 THC) per package

Medical-Only Concentrates

• A concentrate may contain more than 1,000 mg THC per package, up to 2,000 mg, only if it is:
  • Labeled “FOR MEDICAL USE ONLY”
  • Sold exclusively to medicinal-use patients

This means a concentrate does not automatically become medical-only because it weighs more than 1 gram.

Why Rosin Is Often Sold in 2-Gram Jars

Rosin is a solventless concentrate made without chemical solvents and instead produced using mechanical methods like heat and pressure. Because of how it’s made, rosin often tests with:

• High THCa
• Lower delta-9 THC at the time of testing

Because the adult-use limit is tied to delta-9 THC per package, some rosin products can be packaged at 2 grams while remaining compliant for adult-use sale.

This is not a loophole; it’s the result of how the regulation is written and how cannabinoid content is defined.

Why This Has Been So Confusing

The confusion usually comes from three places:

• Label interpretation

Many people assume “Total THC” is the legal limit, when the regulation references THC (delta-9 THC).

• Old industry habits

Before solventless products became common, most concentrates were sold in 1-gram formats, leading to the false idea that 1 gram was a legal cap.

• Vape cartridge norms

One-gram vape cartridges became the industry standard largely because most cartridges are made with distillate or live/cured resin, which typically contain higher amounts of delta-9 THC per gram. Because these formats often reach adult-use THC limits at smaller sizes, the one-gram norm was mistakenly applied to all concentrates, even though solventless rosin follows different formulation and packaging considerations.

Adult-Use vs Medical: A Simple Way to Explain It

Here’s the easiest way to explain it to customers or staff:

In California, concentrate limits are based on how much THC (delta-9 THC) is in the package, not how many grams the jar contains. That’s why some 2-gram rosin products are legal for adult-use customers.

Premium 2-Gram Rosin Brands Available at Tropicanna

At Tropicanna, we carry respected solventless brands that are known for producing thoughtfully formulated rosin, including 2-gram options when compliant.

710 Labs

710 Labs is widely recognized for setting the standard in modern solventless cannabis. Their rosin offerings emphasize cultivar expression, terpene preservation, and consistency with packaging decisions designed to align with California compliance requirements.

Have Hash

Have Hash focuses on clean, terpene-forward rosin that highlights flavor and texture over raw numbers. Their approach reflects how solventless cannabis has evolved toward balance and experience rather than sheer potency.

Rosin Raiders

Rosin Raiders brings a connoisseur mindset to solventless concentrates, offering products that showcase careful processing and terpene depth. Their lineup is a great example of how rosin can be packaged responsibly within adult-use rules.

What This Means for Customers and Staff

• 2 grams does not automatically mean medical-only
• Rosin is a solventless product resulting in lower amounts of the delta-9 and higher amounts of THCa.
• The determining factor is THC (delta-9 THC) per package
• Labels and compliance decisions should always be followed as printed

If you ever have questions about a specific product, our team is happy to walk through the label and explain how it’s classified.

The Takeaway

California cannabis regulations do not limit adult-use concentrates by weight. Instead, they limit THC (delta-9 THC) per package.

That’s why some 2-gram rosin concentrates are legal for adult-use customers, while others may be medical-only, and why understanding label terminology matters.

Education like this helps customers shop confidently and helps the industry move forward with clarity and transparency.