When to start spraying colloidal silver

[dieselskunk]

I am in Massachusetts and I have a G13 Haze feminized that I want to try to get feminized seed. I have read about colloidal silver and want to spray a few lower sites to get pollen to produce feminized seed. Do I wait until August to spray it or start now?
I am growing in a 30 gallon bag with composted manure and local good soil filled with lots of worms.

 

[Lungcooking]

start to spray one week before plant starts to show signs of flowering.. spray every morning on the nodes.. and that´s enough
avoid spraying on the leaves as will cause strange growth and wont be of any help

once they start developing flowers they should be all male, ehehehe