Force flowering

Sup all
I am planning on force flowering some of my freebies this year & wondering how short i can flower them as i have a small descrete space in my garden.
I was thinking of letting them get about 6 nodes then go for it as i still reckon they can still produce 2-3oz each being flowered under the summer sun.

Has anybody done this for a early harvest before ? If so i would appreciate some info on pot sizes & height before they were flowered ect...

i am wondering this also i have a 3 foot plant showing preflowers of a female and want to know how long before it will flower and how much yeild no nutes used topped has 4 main topps

i use a large trash can at night to cover 1-2 of my plants every grow....that way i have some harvested by september and allow my other plants to grow out...if the plant gets too big for the trashcan use a large cardboard box....depends on the strain if you want to figure out yeild right now....you can force flower from seed or clone if you want...more height means more yeild though....