There are many sterile butterfly bushes on the market right now. They don't spread seeds and aren't invasive. The ones I planted are all sterile; they include Butterfly Bush Pink Cascade, Miss Violet, Miss Molly, and Prince Charming. The Prince Charming is a beautiful red butterfly bush! My neighbor has Butterfly Bush Pugster in a planter - it's a miniature butterfly bush and also sterile.
There are many sterile butterfly bushes on the market right now. They don't spread seeds and aren't invasive. The ones I planted are all sterile; they include Butterfly Bush Pink Cascade, Miss Violet, Miss Molly, and Prince Charming. The Prince Charming is a beautiful red butterfly bush! My neighbor has Butterfly Bush Pugster in a planter - it's a miniature butterfly bush and also sterile.