Dianne the purple and pink double have neither proven to be invasive although the white one which was bought as honore jobert is very invasive. I have thought of digging it out several times but it is so beautiful at this time of year. I just dig up the excess as if they are weeds. I like the little shade of light green that surrounds the yellow center. It was bought many y ears ago from Bluestone.
John
We are expecting light frost tonight
