Plant yellowing

blaa

Member
This plant has started severely yellowing. It doesn't look like simple (at least not solely) Nitrogen deficiency tho since some of the veins look green. The yellowing affects the bottom of the plant.

I have gave the plant 2 times about 2ml of BioGrow before but doesn't seem to be fix it.

Should i just give much more BioGrow or could this be over-fertilization? Ph?

 
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