Nutrient deficiencies

[Dollythehun]

Sigh. Yes, we had our water tested, we live close to a landfill, so when we bought, we had it tested. Probably need to do it again.

However, our iron uptake is poor due to the reasons you listed. Normally, I would put actino iron in the potting soil but, orchids are not in soil. My discoloration is mottling, I know the difference.

My point in the OP was to present the link and get some fertilizer suggestions. As to my drinking water, it's filtered from the fridge. I don't want RO because I don't want to run the pump that much. (Btw, for my age, I am in excellent health, I try to drink more wine than water&#128518.

Now, back to the original question...

---------- Post added at 07:47 PM ---------- Previous post was at 07:37 PM ----------

Originally Posted by Fernando

I wonder if anyone of us has seen a calcium deficiency in orchids.

Chlorosis can appear on lots of occasions, and mostly not because of nutrient deficiency, but because of under optimal environmental parameters, read: not sufficient light in winter, suboptimal tº (too cold), humidity stress (too low rH).

Yes. I agree. I had been looking at temp and light and that did not seem to be the reason. This was a good link with pictures...