Stunt Monster is a registered (CFIA) product and is safe to use on cannabis plants, but its mode of action is different from traditional PGR height reduction products.

There are two application rates on the bottle which are both effective however we have learned from some of the consultants that there are more ways to use. The application rate on the website -see Stunt under Specialty Products and then click on "More Info" also works effectively.
The key to Stunt working is to start using in the last week or two of the Vegetative stage and then increase the level prior to flowering followed by a maintenance level for the first 2-4 weeks of Flower.
The takeaway is how Stunt triggers a flowering response in the plant and sends the energy into Flower Production instead of in to increased vertical height.