What's this flower?? (Hint added)

Thanks Margaret W.

I think you must have some of the most challenging plants and flowers.

Hi Marston,Just a quick line to say that I think maybe our friends should know that the flower is an herb with purple bell shaped flowers as they are hard to see in the photo. I miss being the guesser!

Marg..

I'll run this one another day...

This herb has bell-like purple flowers
Answer - Comfrey

Thanks Margaret W.