Here is my thread for what I did with colloidal silver.
I believe I started too late to begin application (what @Hellraiser said) of the CS. I didn’t get any pollen sacks to develop, and then I ran into a problem with the ash from the wildfires in September and 3" of rain in one week and I lost the entire plant to bud rot.
The next time I try this project (outside), I will (1) start with a plant earlier in the growing season, (2) start earlier in the growing cycle (start spraying ~3 wks after popping soil), and (3) be less careful (use a sprayer and not a paintbrush for application).
Just my two cents.