i thought that bout one day for the plants to notice, but seems the hormones start to change as soon plant is exposed to set time of 'night' so if u flip 12/12 ur plant will notice in that 24 hours, takes bout a 5/7 days for visual, changing the time of 12/12 when already on 12/12 by having anothe 12 hours light will make it think its going back to veg thus stressing it, wont really make a massive affect on growth/yield but less stress is best:jointsmile: if u need to change the times.. do it the dark
higher_than_you Reviewed by higher_than_you on . can you alter the dark and light hours? I have a perpetual grow going but my veg room has out paced my one to three plants into flower a week pace. I also just want to finish out this strain. So I am going to flip my veg room to flower to so both rooms are on same time on and off so I dont have to mess with light leaks from one room to the other either. My flower room is light tight but my veg isnt. Now onto my question. Can I alter what hours are the dark hours in my flower room? I.E. I'm on a 9am to 9 pm lights on cycle but Rating: 5