TN Rick, I never hike around here in the summer. We have far too many ticks. I'll wait until it gets a tad cooler
to poke around some areas for limestone. In my particular area, we have sandstone galore, but very little limestone. Most of the limestone formations I know about are in state parks and I think going around with a little hammer might be frowned upon, you think?
For now, my Paphs. seem very happy with Orchiata and K-Lite. I think I will try some gravel when I repot henry. I
don't use any sphag. in my Paph. pots. It stays waaaay too wet too long in my very humid gh.