National Mail-In Hemp Program

What is it?  Green Leaf Lab’s National Mail-In Hemp Program gives hemp CBD growers, manufacturers, and distributors around the United States access to quality analytics.  Clients can mail in hemp samples from anywhere in the United States to receive analytical testing for potency, pesticides, heavy metals, microbials, mycotoxins, vitamin e acetate, terpenes, residual solvents, and more.  This program provides an easy, reliable, and cost-effective way for clients to receive quality hemp CBD testing from a state-of-the-art laboratory.

To take advantage of our expanded services please email us at or call 916-924-5227.


Why choose Green Leaf Lab’s Mail-In Hemp Program?


Green Leaf Lab is in the forefront of hemp testing in the nation, providing analysis for industrial hemp cultivation, extractors, processors, CBD product companies, and infused foods.

Accredited:  Established in 2011, Green Leaf Lab was the first cannabis laboratory to be licensed and accredited by a state agency, showing our commitment to science.  Green Leaf Lab is an ISO 17025 accredited independent third-party analytical laboratory.  ISO 17025 is the international standard for testing and calibration laboratories.  For those looking to ship hemp CBD nationally or internationally, ISO 17025 accreditation is key as it is a globally recognized laboratory quality assurance standard.

Experienced:  Green Leaf Lab’s premium Mail-In Hemp Program gives hemp CBD growers, manufacturers, and distributors access to our chemist team who has over 50 years of combined experience in nutraceutical and pharmaceutical product development and analytical chemistry.  We have the analytical capability you need to ensure your product is tested accurately and reliably.

Reliable:  See what our clients have to say about us.

“We’ve been using Green Leaf Labs for about 4 years now and have had nothing but great experiences – they are reliable, professional + one of the most consumer-trusted labs.”

“Green Leaf Lab is the best lab service I have worked with by far, they are consistent and have great turn around times on test results.  Testing is a breeze!  GLL brings their A game to the world of testing and I truly appreciate how easy they make testing!  It’s a tricky industry and anything that makes it easier to navigate is a blessing.”

“Everything from the sampling, testing, questions and professionalism have exceeded our expectations.”

“Green Leaf Lab is by far the best lab!  The entire organization is top-notch and their customer service is impeccable.  HIGHLY RECOMMEND!”


Leading Hemp Testing Lab For:

  • Industrial Hemp Cultivation
  • Extractors and Processors
  • Cannabidiol (CBD) Product Companies
  • Infused Foods

We offer the analytical services you need. Contact us today at

Helpful Resources:

Rule: 2018 Farm Bill

Article: “Third Party Testing Is An Integral Aspect To Consumer Safety In CBD”

Article: “A2LA Accredits Green Leaf Laboratory to ISO/IEC 17025:2017”

Article: “Green Leaf Lab Certification Program”

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