I've had deer eat them to the ground, but they always come back.
Wow! Maybe my locals just haven't found them yet. I know bugs and caterpillars sure like them. That is one of the beauties of these jewels, you can cut them down to the ground harvesting them and they come back quickly. Yesterday, I found some brown spot, rusty color, on my plants. I just removed the leaves but have know idea what this was. Several of the spots were larger than a quarter, some smaller. Any idea?