How to turn hermie w/o chemicals?

I'm not sure if this is a problem so much, but in my medical grow I've managed to score all females from a small batch of seeds I sprouted. I've got a great female that I've cloned, so I've got three of the same plant at the moment that I want to reproduce.

Due to my plant limit, I can't keep a bunch of clone mothers, so I want to hermie one of the clones, and then pollinate the other. This way I will keep the same genetics as the mother, and have all feminized seeds for later use.

The question I have is how do I stress this plant enough to trigger it to turn male on me, but without the use of chemicals?

If I put it in my flowering room for a week, and then back outside under full sun for a week, should the stress of the changing light cycles be enough?

Colloidal silver sprayed on the branch or plant you want to get male flowers from.

Make sure you spray the cannabis with a strong enough colloidal silver solution (at least 30 PPM of silver)
Spray thoroughly to almost drench all the parts you want to turn into pollen sacs
Spray regularly, at least once a day for 10-14 days, starting when you change the lights to 12-12
Spray every day until you see signs of male pollen sacs forming. Some hardy strains may need over 2-3 weeks spraying before they 'turn'.

Don't smoke any parts you sprayed. The rest of the plant is still safe to consume.

Here's a link with additional reading for you. https://www.rollitup.org/do-yourself/78710-how-make-colloidal-silver-make.html

What strain? Some are harder to hermie than others

when your ladies are in 12/12 during the dark period give the plant you want to hermie 10minutes of light 3 - 5 times each dark period for a full week , that will 100% hermie her

Thanks for the tips, I think I will try going the light leak route during the dark period. If that don't work, I'll have to give the silver a shot. Would rather not resort to chemicals though, as harmless as I'm sure the silver is - just don't want to risk anything with my health problems.

The strain is Pakistan Chitral Kush - which is an inbred landrace from Cannabiogen. Not sure if that will make it more or less difficult to hermie.