overfertilize

Hey I just started to grow my first set. One Northern Light 4 weeks, One Cheese 3 weeks, one Skunk 4 weeks wich seems to have some problems... Allmost all of the leaves have some yellow contrast in them, and most of the upper ones is pretty yellow alltrough. She do not have as much power in...

Has anyone ever followed the Biobizz chart to the letter? Something that bothers me is that I always read "use noots at half strength, or even less.." . Does that advice apply to standard nutrients, used for say, Tomatoes, and suchlike? Or does it apply to the Biobizz chart with our...