06/16/2026
Most cannabis operators have seen CFUs listed on a lab report—but what do they actually measure?
CFUs (Colony-Forming Units) are used to determine how many microorganisms remain viable and capable of reproducing. That’s important because microbial testing isn’t simply looking for the presence of mold or yeast—it’s measuring whether those organisms can continue growing.
A batch can look clean, smell great, and still fail microbial testing if viable microbes remain present.
That’s why remediation technologies like the Rad Source RS-420 XL focus on disrupting microbial DNA and preventing reproduction. When microbes can no longer form colonies, CFU counts decrease and compliance outcomes improve.
Understanding CFUs helps explain how microbial testing works, why remediation is effective, and why consistency matters throughout the cultivation and post-harvest process.
Read the full blog to learn what cannabis labs are actually measuring and why CFUs play such a critical role in compliance.
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