Plants need their dark period to convert the chemicals they have absorbed in the light period (i.e.anorganic CO²) into organic molecules that helps the plant to grow (The Kranz anatomy). This is called the CALVIN CYCLE.

This means, the plant converts chemicals and renews it'sself with help and sythese of those chemicals.

That's why I always use a 18/6 cycle for VEG. I've tried 24/0, but I've found the plants have less stress and look healthier when you give them their dark periode and opportunity to preform their CALVIN CYCLE.

Source: www.vc.bioscience.ru.nl

Greets Britewire
britewire Reviewed by britewire on . 18/6 Vrs. 24/0 Whatâ??s up everyone Iâ??m new to growing, I never grew anything before, and im going to take a swing at it, I did my research on the forums and watched a few grow movies heres where im at so far Flood and drain system Rockwool cubes 4, 40 inch Cool and warm white fluros 6 inches from the plants GH nutrients ½ strength Ph 5.9 No ppm meter Rating: 5