I understand your sentiments but personally I love it & am quite happy to have it grow & grow & spread. We have 6 ac. & I wouldn't mind one bit if there were wildflowers all over the 6; in fact, that is my ultimate goal. We bought this place about 2.5 months ago. I so enjoyed looking out my kitchen window & seeing the "purple smoke" look the stachys presented. They also were/are in a bed around a sycamore tree but caladiums began coming up (planted by the previous owner) & we pulled the stachys out about a month ago & so far no new ones have appeared. Oh, I realize they will be back but it's not like I'm out there battling them daily or weekly.
AND I will say that it's quite possible that 1 day I will be cursing them.
I am a strong believer in the simple fact is that what matters in this life is how we treat others. I think that's what living is all about. Not what I've done in my life but how I've treated others. ~~ Sharon Brown