Popped some regular seeds 4 weeks ago. Switched lights from 18/6 to 12/12 about 10 days ago so I could cull the males once identified. I now know the boys from the girls. I want to up pot and take them back to veg. What problems can I expect? Greater chance of herm? What would be the minimum time before going back to flower? Plan is for 3 weeks of veg then back to 12/12.