i have not found a low humidity to be an issue... i run under 20% relative almost all the time and no one has said boo about it so not an issue,

good luck and hope you follow directions better in the future.. the bottle knows whats up (at least it better!)
peace
-J
mainegrown Reviewed by mainegrown on . 1st Grow: Please Help with Canna Coco + Plants turning Yellow Hello All, First off, thanks to all the people that actively post! It is because of their knowledge, I have been able to make it this far :) Now on to business... It has been about 3 weeks old since the seeds popped through the Coco. I have noticed over the past week or so that the leaves are starting to turn yellow. They are still growing but I can tell something is wrong. I am guessing it is a Nitrogen deficiency, but I am so new at this, I wanted to ask the pros! Rating: 5