The Blue Trumpet is an invader here and we keep pulling it out as it has spread all over the garden I must admit however they are beautiful flowers.
I do not see butterflies nor honey bees approaching it but it is the favourite of the bumblebee. The bee gets right inside the flower and stays there for quite a while. I do not know if the flower produces nectar.
I only wish what we want in our garden grows as robustly as the blue trumpet
Do you have invaders in your garden?