Geranium, Cranesbill, Hardy Geranium 'Khan'

A robust plant resembling G. sanguineum but larger in all its parts.

This cultivar has green foliage and large magenta fl...Read Moreowers from June to frost. It requires regular moisture, and where happy a single plant can grow to 9 feet across in a season before dying back to a single dormant crown.

So says Allan Robinson, the horticulturist who discovered this plant at the RHS's Wisley Garden in the 1980's. He's convinced that it was a chance cross between G. sanguineum and G. wlassovianum. http://www.geraniaceae-group.org/story_of_khan.html

He suspects that some plants in circulation as 'Khan' are seedlings and not vegetatively propagated. This cultivar is fertile and seedlings more or less resemble the parent, but only vegetatively propagated plants are 'Khan'.