GMSgrowsanswered grow question 4 years ago Leaf claw is due to to much nitrogen. The red or purple stems is due to not enough nutrients. So how can that be? Well, when you give your girls to much food, they take it up until some damage is done, leaf claw or tip burn, then because the feed is to high they stop taking certain elements. As my girls grow I watch the leaf stems and if they start to turn red, purplish and it isnt a genetic trait, then I know their wanting a little increase in their feed. Just straight water now if your dirt growing for a week or 2 with a little extra runoff to wash some salts out and you should be good. Cheers