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WeedBMstarted grow question 2y ago

Seeking help for three plants with magnesium deficiency due to low pH. Using Remo nutrients and BigFoot Mycorrhiza initially. Flushed pots with pH 7 water, but runoff pH remains at 5.8, dropping to 5.2 after a week. Requesting advice. Output ppm matches input, VPD is correct.

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LSchnabelanswered grow question 2y ago

Ammonium and Sulfer based fertilizers are known to reduce the pH of soil. You may want to take a look at your nutrients and see what they are derived from. Sodium bicarbonate (Aka baking soda) can be used in a mix to flush your plant to help raise the pH in the soil. Be careful and defiantly check your pH in your mix if going this route.

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