Ok heres the deal. This is my first grow and so far everything has gone great. My plants are a little over four weeks into flowering and i am having some problems with one (white widow X chemdog) All the leaves are turning yellow and dieing started from the bottom and i thought maybe thats what they do after reading some threads on here. but now the leaves at the top are turning yellow and i have no idea how to fix it. at the rate its going all my leaves will be dead by end of flower. here are some pics not good ones but i made do. i have 2 400w lights. 1 hps+ 1 MH. Could this be caused from high ph? tested it today and it is about 7. any thoughts will help.
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