I too am having the yellowing of the lower leaves a bit. I trimmed the tips of a few, and took 2 whole leaves off. I was thinking it was more nute burn than N deficiency. What is this orchid formula that helped you out?

I know next grow I will be going with nute free soil mix and adding my own nutes so I can know exactly what goes in.

You can see a few yellow/burnt leaves in these pics I think, this was before I trimmed them.

[attachment=o149804][attachment=o149805]

[attachment=o149806]

day 27