Noticed this today.
Day 26 of flower. Watermelon Zkittlez Auto in 19L pots of coco.
Feeding Megacrop 0.8 EC @ 6.0 pH. ~20-30% runoff.
Been at that EC for 5 days now, up from 0.7 which I had been feeding for weeks.
I checked every leaf and this is the only one currently effected.
The leaf was near the top of the plant.
No smearing when touched so I dont think rust.
Doesn't quite match up to any pest damage pictures I've seen.
The 600w HPS (switched from MH a few days ago) seem fine at 15".
I'm guessing early lockout (which I doubt) or early cal deficiency.
I plan to double check runoff tomorrow; last time was 9 days ago, numbers were good. If no issues there I'm guessing calcium. If so, I guess I'll either bump the MC feed 0.1-0.2 EC or cut back the megacrop dose a bit while giving a calimagic (1-0-0) boost. Probably the latter to keep N in check.
Seem reasonable or am I missing something obvious?
Appreciate any thoughts. Thanks.
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