TL;DR, I had a small circle garden get pushed over a hillside when I forgot it was there when my new driveway was installed...some of the plants (irises) are resillient.
It's been nearly a year since TB Sugar Blues ans TB Drinks at Sunset got thrown off a cliff and buried in shade, but they're alive with some minuscule rhizomes. I moved them both into a bright, sunny side of the house so fingers crossed, they do something.