Hi guys, just hoping someone can give me an idea of what causes an auto plant to have very dark green leaves, thick solid stems and extra thick leaf stems with enormous leaves? The plants also seem to be just starting flowering after 6 weeks, they seem to be going slower than they should. Could it be the soil which is Canna Terra Professional soil mix, I am thinking is it too much Nitrogen? I have not given them any nutes yet should I start? regards and thanks in advance.