Madmax
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Read this on growing exposed…if your plants need say more k then this could b a clue..Plants secrete acids and bases in their root zone to adjust the pH depending on what nutrients they want to eat. If a plant wants more phosphorous and potassium, it may actually secrete an acid, dropping the pH of the rest, so that it can uptake more P and K. It is also possible if the plant wants more calcium, for instance, that it may raise the pH in order to make that calcium more available. If we decide that 6 is the perfect number and every single time the point moves to 6.2 or 5.8 and we run in there and adjust it, it is possible we can be working against our plants.”