Magnesium deficiency
Potato Magnesium Deficiency
A potato leaf showing magnesium deficiency

Magnesium deficiency is a common and serious disorder which is made worse, not better, by standard feeding.

Identifying FeaturesEdit

Discolouration begins on lower leaves and moves upwards until all foliage is affected. Yellow areas may turn brown.


Spray with Epsom salts (½oz/pint) or use a foliar spray containing magnesium.


Use a fertilizer which contains magnesium (Mg).


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