Hi OMM!
Sorry I haven't been around as much lately, but looks like things are getting back on track with a close call on the White Rhino. With your increased heat -- can you add silica to your soil with the OC+? Good for heat and pest resistance both, and builds stronger stems and branches... Just a thought, I thought I remember that you did use Silica at some point? Or am I just imagining that? I don't understand OC+ enough to know whether the two are compatible, but I'd bet they are.
I agree on the Mag deficiency, but the notion that N toxicity could have caused it seems like a valid consideration to me. One thing to consider might be a periodic flush with this plant just for regular maintenance. Maybe it's sensitive to N or needs more mag than most? The plants I have in bloom right now got too much nitrogen, and I'm kicking myself. It's like any amount is too much for them - some plants just seem to be this way...
You were right - great help and great community. Sure glad you have had so much support!
Congrats on almost having car paid off - that'll help a bunch I'm sure. Hope you and Jo are both doing well!