Looks like I fell into the classic coco trap — when it’s still too early to water to runoff. You either overwater, or the pH in the root zone keeps rising every day.
The result is obvious: #4 and #6 got calcium and phosphorus lockout because I didn’t water to runoff right after transplant. They’re still recovering.
#3, on the other hand, is doing great — you can tell by how perky she looks. She was transplanted later, so she got proper runoff earlier than the others. It literally took just 2–3 days without runoff to cause issues.
Overall, these are just early-stage problems that won’t matter later. We’ll probably remove those big leaves anyway since they’ll be in the shade (or maybe not, if they’re still functional when side lighting kicks in — then the marks might stay 😄).
Plants are already adapting to the watering routine, and root zone pH should stabilize soon.
Feed (input): EC 1.5 / pH 5.4 (today tested 4.9 just for fun)
Runoff: EC 1.1–1.2 / pH 6.4–6.7
Experimenting with VPD — was around 1.3–1.35 most of the week, now pushed to 1.5.
Growth rate is decent, leaf color recovered to bright green, no stunting.
Interesting note — plant #6 has a very unusual branch structure, never seen side branches attach like this. Doesn’t want to grow upward at all 😄