Most regretted invasive plant ever
What have you planted as a hosta companion that you regretted the most?
Here's mine: begonia grandis. Every seed germinates. Everysingle one. It's the cockroach of the plant world. I now have beeeeelllioons and billions of them. And, I've decided that I don't like the coloration of it with hostas, anyway. If you ever plant one of these things, do not let it go to seed.