Joined: 9/8/2026(UTC)
Posts: 8
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Half the yellowing leaves posted in CBD grow threads are not a nutrient shortage at all but a pH problem blocking uptake. Soil wants roughly 6.2 to 6.8 and coco or hydro closer to 5.8, and drifting outside that range makes the plant starve in a full pot of food. The lockout chart on https://calmcbdseeds.com shows which elements disappear first at each end of the scale, which makes diagnosis quicker. A ten dollar pH pen pays for itself in one grow.
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