Still confused Is this blight?

[chasingmytail]

I noticed this on a few leaves today - I looked it up and read it is magnesium deficiency. Last week I bought Epsom salts in boots but far too expensive there think it was £5 and used it once in the bath and the rest on my tomatoes!! By the way it isnt salt it is magnesium Sulphate and not to be confused as not the same as putting salt on the ground. Suppose there is grades the more pure its classed as for body use but you just need the cheaper stuff.

[Jungle Jane]

Mine's from the chemist 100% magnesium sulphate heptahydrate,Epsom salts. This says it's a medicine you can drink the solution to help with constipation but also says relieves pain from sprains so that sounds like a bathing salt? It could be the same thing & work the same way on a plant but don't drink the bathing salt one in the way you would with this medicinal one because they seem different but the same?

[Penellype]

Medical grade will have less impurities than the bathing grade stuff. There are very strict laws about the purity of anything that is sold for human consumption.