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I think i have a ph problem in my organic soil, would you guys please give me a feedback on whats wrong with my plants? https://www.rollitup.org/marijuana-plant-problems/378389-help-newbie-diagnose.html

Could anyone else confirm that this is a cal/mag deficiency? So, I check the ph, if it's of i try to balance it with something alkaline like woodash right? But if i have a good ph, am i supposed to fertilize more or do i need to find an extra cal/mag source?

No, why is that good/bad?

Unfortunately i don't have a ph meter, but i know the soil i bought was 6 and i know that my tap water is very soft.

This is my first grow and I would love it if you guys could help me to find out why my plants are sick, the symptoms are: necrotic spots, yellow spots and impaired growth. The spots attack primarily older leaves but some sprouts are deformed and growth impaired. Spots appear random, there is no...