Very pretty banner!
And yes, very invasive.....BUT, still worth it, imho.
I have to pull them out occasionally....they grow through the soil,
and by seed.
At a former home, I had let them go in a rosebed (before I knew better).
Then (after a few years unchecked) had to use a pitch fork to dig out the roots. That was extreme, but now I just cut them back after blooming before they go to seed, and pull out those that are in the wrong spot.
Drought tolerant, free blooming, but be careful where
you plant them.
Here's a good article on them...
https://plants.ces.ncsu.edu/pl...
Who can resist them? More pros than cons for me.