Burmeseanswered grow question 3 years ago Hi there,Normally people put their plants in vegetative stage for 6~8weeks before switching into flowering circle.You need to consider some factors like your grow space size(Is it enough for flowering stretch including light distance), plant's health (Are plants under stress or unhealthy),plant's size (how many colas do you expect and how much can be the yield with current size).For me,With your plant looks and size,I wouldn't mind to change over 12/12 anytime from now.Good luck and happy growing... ✌️