12/12 Autoflower? Last 2 weeks?

My Short Riders are on Day 52 really close to harvest but they are also in the same room as 3 random bagseeds who have been vegging under 18/6 with my short riders. But a few times (I don't have a light timer) the lights has been left off too long, and one of the bagseeds is female and it is WAY too big for my space. Can I just start going 12/12 even though my short riders are still in there with 2-3 weeks left until harvest? How will it affect the short riders? I was going to give them a long dark period before harvest because I heard it will make them produce more resin but how is 12/12?

anyone?????

eeeeeeeeeeeeeeeeeeee

i bet that they would do fine with the 12/12 and there close 2 harvest so i wouldnt think that it would affect them at all
if that plant thats 2 big top it and u will get 2 main colas on top

No! Keep them on 18/6!

Dont switch them you may regret it. Mine had about 3 weeks left Took them from 18/6 to 12/12 they stopped growing for about 2 weeks and the new bud formation was weak after it started growing again.