Q.Butterfly Bush .
Butterfly bush is an invasive plant, you are a huge source for gardeners info. Instead of care instructions please at least inform them of alternatives. Thank you for your work
Certified GKH Gardening Expert
Almost every plant has the ability to become invasive given the correct environment. Given that, it is up to each individual to ensure that the plant that you intent to plant will not be invasive in the area. We must be fair, and give information for growing any plant.
I CAN direct you to this article, which will give you information on controlling the shrub: