why don't you just transplant them into some sort of pot or grow bag. then you can move it to a spot that only recieves so much light in the day and shade the rest. i have a plant right now that, that very thing started to happen to it. i transplanted it into a fabric grow bag and relocated it with out checking how much light the spot recieved through out the day. well after a few days of being in this spot of only recieving around 6 hours of direct sunlight and shade the rest it started to produce female flowers. once i noticed this i moved it bc i wasn't ready to induce flowering but never the less once it was relocated to this new spot and recieved less direct sunlight it started to flower. so my answer to your question would be yes under the right circumstances.