:smoking: hey Spiffy, what's good, luv? ... so, some odd stuff happening here,.. that tip claw looks like N-tox, but the plant seems too pale for that,... the interveinal yellowing looks like Mg defc., but hitting higher up than usual,... are you using Ca-Mg, to keep that coco's Ca-hogging from happening? Recall what we talked about with coco's odd CEC characteristics,... well, Mg is also strongly bound, just not as much as Ca,... and are you doing about 15% run-off every time? this is critical for coco as well, to keep the nutes from building up,.. and of course, a pH reading is also important, to see if this is a lock-out situation, or lack of,.. or a nute build-up issue,.. did you get a TDS/EC meter?-- also critical for managing your nutrient strength,.. recall, coco is more like hydro than soil! With this, we can also check your run-off for ppm/EC and see if there's too much build-up in there, which can screw with pH and mess with uptake of other nutes,... I suspect some of both here, but with no data, I'm just guessing,... seems you feed strength has been pretty mild, but cumulative inputs can be insidious for salts accumulations,...
Spiffy, have you checked out the Defc. Pic Depot here, in the highlighted sticky section above here? there's great pics, so you can get some familiarity with symptoms,...
