I made a batch of infused oil and it did not come as strong as I had hoped. My question is, can I re-infuse my infused oil with more cannabis to make it stronger?
Yes you can. Meaning you can add more cannabis and infuse your oil again to up the potency.
Ardent Cannabis, makers of my favorite cannabis cooking gadgets, the FX and Nova has an interesting article on their website where they put “infusion boosting” to the test, with both CBD and THC. Follow this link to read their lab test results.
In a nutshell, what they found was you definitely can boost your infusions, although you will lose a little bit on the second infusion. In other words, you won’t double your strength, but you can get close.
Starting with decarbed cannabis, let's say your original infusion contained 90 mgs of THC per ounce. Re-infusing it will not quite double the dose, so in this example, the boosted infusion might contain about 170 mgs. instead of 180.
The volume of oil (or butter or whatever is being infused) matters too. The less oil being infused, the more potency you will lose on the second infusion. This is because there is only so many cannabinoids you can pack into a tiny amount of oil without it becoming saturated (although the exact number is elusive to find). Nonetheless, the article at the Ardent website that shows the lab test results when Infusion Boosting is most enlightening.