MistaOCanswered grow question 24d ago If the pH of your watering solution is within the optimal range – personally, I would aim for around 6.2 – and you can rule out a nutrient lockout caused by incorrect pH levels, then the symptoms suggest a calcium-magnesium deficiency, with magnesium likely being the primary issue. In this case, using a CalMag product should help resolve the problem, provided the pH is on Point.
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