I think my son's tomatoes have a Magnesium deficiency. Trolling the
internet, the consensus seems to be to treat with Epsom salts, but I am
not sure how to go about this so how would I go about using this
treatment? What dosage? What dilution? How to apply; spray or dig in ?
Crappy photo of the leaves at :-
http://www.sidtech.co.uk/iu/soup61498546123.JPG