I don't have to water or add much mulch to this bed; the lamb's ears cover exposed soil in between other plants and use little water themselves.
Some gardeners regard this plant as a nuisance, but I've only once seen a seedling out of the beds/areas I put it in, and that was where I tossed the clippings, so you'd expect some there. I love them, the bees love them, and I wouldn't want to be without them. I do cut mine back after the first heavy flowering, and thin them down a bit at the same time, then cut them back before winter...perhaps that makes the difference?
The leaves are soft and fuzzy, and they also have a wonderful raspberry-lemonade smell when rubbed - truly delightful!