These are the top 2 purple flower bush names given here:

1. Dwarf Iris: Its scientific name is Iris Pumila. Its plant size is 1–3 feet tall and its native areas are Russia, Caucasus, and Northern Iran.
2. Balloon Flower: Its scientific name is Platycodon Grandiflorus. Its plant size is 1–4 feet tall and its native areas are East Asia, China, and Japan.