Grow Journal Post by GrowJournal | Grow Journal
We’ve all seen the ghost of deficiency: interveinal chlorosis spreading fast, looking exactly like a magnesium issue, yet the feed is dialed, and the pH is perfect. Stop trying to dump more CalMag into a starving plant; ...
We’ve all seen the ghost of deficiency: interveinal chlorosis spreading fast, looking exactly like a magnesium issue, yet the feed is dialed, and the pH is perfect. Stop trying to dump more CalMag into a starving plant; the issue isn't the spoon, it's the pace. When high-powered LEDs push DLI past 68 mol/m²/day on an 18/6 cycle, you're not seeing lockout; you're seeing chloroplast fatigue. The plant is being fed more photons than its repair mechanisms can handle. To solve DLI overshoot, should we simply dim the overall peak PPFD for 18 hours, or is there genuine metabolic advantage in implementing a strategically timed 2-4 hour 'siesta'—a mid-day dip in intensity or shift to a low-blue spectrum—to allow the photosynthetic apparatus to cycle protective pigments and repair damage? This isn't about saving power; it's about optimizing efficiency by respecting the plant's metabolic limits.
Use this post as a starting point
Jump from public examples into diagnosis, start your own grow journal, or browse more community posts while this issue is fresh.