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What deficiency?

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Nitrogen deficiency yellowing starts at the tip then down the centre of the leaf until late stage when all yellow.

If it starts at tip and goes down outside it's either Potassium or Magnesium deficiency.

Potassium will go down both sides and uniformly fill but magnesium will fill in the yellow as it goes.

If the lower leaves are a darker bluey green then the deficiency is coming from underfeeding.


So I'm going to say Potassium deficiency but that's just a guess from one photo.



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