well it seems to me you are doin really good then. I think that they will be fine. Up until a couple weeks ago the new growth areas had a purple-ish color to them. Every time i have evr grown they have done this and i feed my babies good. Is it the whole plant or just the new growth areas. You can check out pics on my thread but i dont think the pics are clear enough to see that mine were the same way.

much love .....nasty