Around here, Forsythia does not have the bad reputation it has in some other climes. It is not nearly as invasive hereabouts as people say it is elsewhere.

I planted this one two years ago and it has done well. It's as tall as I am and, today, early May, it is covered in little flowers mostly not yet open. In a couple of days it'll look pretty bright.

Being of anthropomorphic bent, I have imagined that the five or six years the plant spent in a pot before I got it in the ground gave it a lot of pent-up growth energy. It was dying to be in the ground and it has taken advantage of it.