Ok, now I understand.
I'll put some crushed lava rock on my list to try as a semp mulch. May take a while, as most of my semp work is done for the year. I don't like to fuss with them much with winter around the corner and 90+ temperatures at the moment. I'm mostly playing human statue in front of the AC unit the past few days anyway. No snide comments about how I'm dressed,
please!