Can anyone tell me what this is? Four of them have sprung up in a straight line in my garden in the last couple of weeks and are growing rapidly. Given the speed at which they are growing, I think they’re a weed but, before I pull them up, I thought I’d check.
In case it’s not clear from the photo, they have pointed leaves with the outer ones up to a foot long. The newest leaves, at the heart, have a silvery sheen and are slightly fluffy. Ignore the purple flowers - they have fallen off the plant next to it! The pink flowers are from an adjacent miniature rose