Interesting....I've had 2 gooseneck loosestrife plants that I bought 15 years ago (one of the first plants I bought when I moved in ). The nursery I bought it from told me it was a variety that was non-invasive. To this day, I've never found another volunteer from my plants anywhere in my yard.
Evening primrose, on the other hand.....I started with 3 plants probably 13-14 years ago. I decided to remove it a year or two after planting. I'm still trying to remove it!
No new sproutings today, although a few of the jugs are starting to get a little greener, and the seedlings a little taller.
