United Kingdom 
My camelias have started to get yellowing leaves and some leaves have began curling under, do you think part of the problem could be the bad winter we have just been through. I am putting epsom salts on them also plenty of euricaous compost and feed on them. Thinking it could now be just a matter of time and wait and see?
14 May, 2010
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Check the plant on the underside of the leaves and on the stems for signs of infestation, particularly from scale insect or aphid attack, treat for these if you find them. Go and buy some Sequestrene iron tonic, mix up according to the instructions and water in around the base of the plant. Epsom salts make no difference to the soil's ph, and thus are not useful for acidifying soil, so sequestered iron will sort that out.
14 May, 2010