[dabber]

Hi My tomato plant leaves have started to turn yellow at the tops about 4 plants look to be affected they are in pots and are watered enough i have just started feeding as the fruits are set on the first truss any ideas of the cause thanks

[Kleftiwallah]

Is the yellow all over the leaf or just between the veins of the leaf?     Cheers,    Tony.

[dabber]

Its just between the veins   thanks

[Kleftiwallah]

 It certainly sounds like magnesium deficiency. The leaves turn yellow but the green veins remain green. The treatment is epsom salts diluted with water used as either a feed or a foliar spray. You can buy epsom salts from the garden centres.

Cheers,    Tony.