The fan leaves are yellowing and dying. I thought the problem was Nitrogen deficiency. I already add urea fertilizer, 'a lot' of it, and it still yellowing. The pics shows some of the small fibrous root came out of the polybeg. It is just a very small portion of the root. Is this a rootbound problem? I think the pot/polybeg is big enough compare to the plant height. The plant is just starting to flowering.