Yellow in colour

In coco you start your feed at 400 ppm if your growing autos and 200 ppm if their photos. Right from the time they sprout. After the first week if you see good growth up your dose by 100 ppm. Do this every week until you reach 800 ppm for photos and 600 ppm if their autos. I would at least be feeing these at 500 ppm if their photos right now 400 if their autos, with a little cal/mg once or twice a week.