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So closing week 7 now and my 4AM are showing signs...

EelGrows
EelGrowsstarted grow question 6 years ago
So closing week 7 now and my 4AM are showing signs of deficiencies again. I watered(with nutes) ph'd around 7 past few times and the runoff has still been ~5.9, indicating acidic soil(nute lockout)?At this point, you think it's best I just flush with plain tap water(ph ~7.7)?
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Week 6
Leaves. Color - Dark-brown
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CRiSPrGrow
CRiSPrGrowanswered grow question 6 years ago
Hi Eel, you're experiencing PH fluctuations and maybe yes, lockout but mostly due to the very high PH of the incoming watering. This is causing mayhem in your soil . The PH of rain water is 5.5 never go too much higher than that, 5.9 is fine 6.0 is fine anything more than that will cause issues. That's because different nutrients are absorbed at different PHs starting with micro nutrients at 5.7 and up. So your soil is now struggling to buffer up to 6.5 where run off should be. Stop feeding it 7PH it's causing all your problems. Yep, simple as that ! The leaves already affected by phone fluctuations won't recover but the problem should stop spreading pretty fast. Hope this helps ! 🚀
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Experimentgreen
Experimentgreenanswered grow question 6 years ago
Hey there so if you look into the various nutrients and their optimum absorption PHs...most of them max out at around 7, 7+. So there's available nutrients but incappable of using them. I'd say flush with some ph'ed water at like 6.5 if possible and then resume your nutrient line up...see if this helps the plants and changes the runoff ph in any way. You've got some nice flower development but if that ph could get slightly lower i think thats best and would make them happiest. I feel like the input is more of a concern than the output, but i could be wrong. You could add a soil additive like aluminum sulfate, sulfur, any of the sulfate products tend to lower the soil ph. Just a thought. Happy growing and beware of faulty or slowly damaging ph pens as they don't seem to have a very long life sometimes.
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