If a plant shows extensive interveinal chlorosis of the older leaves and late this reaches the younger leaves, the symptoms is due to lack of

The condition of extensive interveinal chlorosis of older leaves which later infects the younger leaves is due to a deficiency of magnesium. Sometimes it causes reddish brown tints and early leaf fall. Magnesium deficiency is common in tomatoes, apples, grapevines, raspberries, roses and rhododendrons.