leaves are turning completely yellow in flowering

i have a few plants their about five weeks into flower and some of the leaves are turning completely yellow... i know its not a nute deficiency their getting plenty nutes what do u think it can be

It is a nute deficciency, however it is natural. The plant is going through a lot of nitrogen at that stage and it begins to use up the reserves beginning in the lower leaves.

Serapis said:

It is a nute deficciency, however it is natural. The plant is going through a lot of nitrogen at that stage and it begins to use up the reserves beginning in the lower leaves.

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I have the same problem, Should i do soething to correct it, like adding more Nitrogen...? Thanks

are you using any nutes at all?

You should add Nitrogen about two weeks into flower. But only for a two week period. After that dont add anymore. This will give the plant the extra nitrogen it needs to stay green through out the flower. But if its already past that 2-4 week mark dont add any N. Just let them naturally yellow up as they use the nutes in the leaves.

???

Sometimes I wonder if we're all growing the same plant...

During flowering the needs for Phosphates and Potassium sky rocket, and Nitrates are in low demand. The increased levels of potassium also create a requirement for Magnesium supplementation.

If your leaf tips are browning, curling, or you have necrosis anywhere on the plant you have a nutrient toxicity in the media which is locking out elements from the plant. If they are yellowing unevenly (green veins but yellow "meat") then you have a calcium or potassium toxicity interfering with Magnesium uptake.

Personally, if it is just a balanced and general yellowing (like leaves in fall) then I'd increase my bloom supplement. If they are dying off completely then I'd flush my media and then continue using my bloom supplement. This is assuming the pH is in the right range.