Bob .. No, I haven't. I know it's on my which list.
My 'Amethyst Myst' got sun scorched during the drought and deer chomped last fall so I didn't divide it as planned this spring, and it has really held up during this heat wave.
Even with the large leaf surface, it's kept up with the transpiration rate and no leaf scorch this year.
I was surprised that 'Autumn Leaves' came back this year. It really suffered during the drought and I thought the deer chomp was the end of it. We had 40" of rain this winter and I guess that was the saving of the plant. I think this is one of weakest heucheras I have in the garden, but this year it is holding it's own against the heat.
I wonder if they need to be cut back hard now and then to rejuvenate the plant.
Ye old typo grrrrrrrrr