I would say NO, it is not. Here is a link, ( did not read it ) but the picture within has good examples of what i know to be magnesium def. Epsom Salts - UK420 ~~~~~~~~~~~~~~~~ I do not know what it is, Possibly scorching from spaying under high light/ temerature situations. Im sure someone here has had that exact problem. However, Your plants look fairly far along to me. Are they? dont forget that a good long leach is vital for nice clean smooth smoke, Organic ninjas please ingore this statement.
Mr.Pink Reviewed by Mr.Pink on . Is this a magnesium deficiency ? LED Grow update no.18, January 12th, 2011 Taken from "indoor growing", "testing the pro-grow 260 LED light" Hey all, So over the past 2 days I have noticed one of the plants showing a deficiency. To me it looks like a magnesium issue. I gave that plant an extra feeding of bat guano and some seaweed and tomato fertiliser. I mixed a heaped tea spoon of bat guano in warm/hot water and mixed it well. However, this extra feeding did not seem to fix the problem. I did some reading on the Rating: 5