I got Mexican Evening Primrose from a friend and although I hated to get rid of it, I had to because it was so invasive. This picture is from 2005 and I haven't seen any growing for several years, so you can eradicate it eventually. Such a shame though. If I had somewhere to let it go wild, I would because I did love it.
The same with morning glories and ajuga. I am still battling morning glory seedlings after 10 years of one planting.
Mexican Evening Primrose
