I had salsify as a bit of a weed for a while. I love the flowers so had let them flower freely. Like
@digitS' I never had roots thick enough to bother cooking. They gradually faded away so I wouldn’t call them invasive here.
Here perennial poppies don’t seem to be invasive either. I’d be happy for them to spread a little more as the flowers are so stunning - if short-lived.
With Iceland poppies, I tend to grow them as a biennial, sowing them in September for flowering early the next year. Perhaps that’s essentially what yours have done.
