Look for dwarf varieties of the butterfly bush, which are less likely to be invasive, or especially created versions that are more sterile, and less likely to spread. Hogan suggests choosing varietals ...
Learn when to prune a butterfly bush to promote healthy growth and vibrant blooms. This guide covers optimal pruning times ...
and sterile varieties of butterfly bush and lantana. As plumbago can grow relatively tall, consider using it towards the back of the border if you are growing it in the landscape as a perennial.