BECOME A LEEF SUPPLIER

Powering the California Concentrate Market

1.6 Million Pounds Processed Yearly

OUR EXTRACTION METHODS CONTRIBUTE TO 48% OF PRODUCTS SOLD IN THE CALIFORNIA MARKETPLACE

We aim to set the standard for quality, trust, and authenticity, becoming the most reliable supply chain partner for brands worldwide.

Located in Willits, CA

Connect

Our procurement team is here to help guide you through the process. What they’ll need to know:

  1. That your material was cultivated without the use of pesticides.

  2. Lot size

  3. Pricing term alignment. We like to ensure all details are agreed upon up front.

Schedule Sampling

Once we have all pertinent information for the materials and licensing, we schedule a sampling date.

Sampling is typically scheduled within 5-10 days after first contact.

Preliminary Testing

LEEF uses a micro extraction process to gain better insights into the final performance of the raw materials. The samples are sent out to a third party lab for analysis:

  1. Micro Extraction

  2. Potency

We share all results. Test results are received around 7-10 days after sampling.

Pickup

After test results are received (and passed) we schedule a time for material pickup.

Pickup is typically within 5-7 days after receiving the test results.

Payment

Terms are adhered too and begin upon verified weight on the material when it arrives are our Willits facility.

OR CALL:

858.585.0670

BECOME A SUPPLIER

Fill out the form below and we will reach out asap.

CAT 4

PREPARING FOR FUTURE REGULATIONS AND CURRENT DEMANDS

Also known as the "Expanded Panel" or "Pesticide Screen Plus," CAT4 introduces 127 additional pesticides, previously screened in other states, into California's cannabis testing ecosystem.

The CAT4 movement aims to elevate California’s cannabis standards beyond current state regulations, prioritizing product safety to ensure better protection for the health and wellness of our community.

Common CAT4 Questions :

Q. What is CAT4?


A. Also known as the "Expanded Panel" or "Pesticide Screen Plus," CAT4 introduces 127 additional pesticides, previously screened in other states, into California's cannabis testing ecosystem.

Q. Why Now?

A. 
CAT4 was initiated following the June 14, 2024, LA Times article, "The Dirty Secret of California’s Legal Weed." Investigators tested products from California dispensaries using the standard Category 3 pesticide panel, along with this expanded panel. This article sparked a movement within the California cannabis market, pushing for higher-quality, truly organic products on the shelves—well ahead of any regulatory mandate by the Department of Cannabis Control (DCC).

Q. What Are the Limits of Detection?


A. Since the newly introduced panel is not part of California's current cannabis regulations, there is no official limit of detection (LOD). Certificates of Analysis (COAs) will only display parts per million (ppm), without identifying a pass or fail status. This means it is up to individual brands to decide what level of detection is acceptable based on their finished goods formulation.

Q. Will the CAT4 screening be present on an Exit Compliance Testing?

A.
 Currently, CAT4 is not part of exit compliance testing in California. The CAT4 panel is available only on Research & Development COAs.

If you have any questions, feel free to use our scheduling form above and we will get back to you asap.

OUR CAT 4 APPROACH

  • At the procurement level, we are engaging in proactive conversations with farms regarding their pest management practices and highlighting the immediate need for truly organic farming. This outreach is also part of preparing for future regulations.

  • LEEF has always maintained a rigorous procurement and sampling protocol. We have now expanded our testing of microextractions to include preliminary results for CAT4.

  • LEEF has made modifications to its extraction protocols and is now conducting single-source extractions. This means the biomass used per batch will be sourced from a single origin. In addition, LEEF remains committed to ongoing research and development to advance cannabis extraction and manufacturing for the betterment of the industry and consumers.

  • LEEF has expanded testing at the bulk oil stage to include a comprehensive COA covering CAT4 pesticides, alongside the standard CAT 1, 2, 3, and potency tests.

PREPARING FOR OUR VISIT

Our procurement specialist will guide you through the process to ensure everything goes smoothly. For extra help, feel free to download our 'LEEF Labs Sampling and Pickup Guide' below!