Complex sentence: This species is native to Eurasia and has been cultivated in many other areas of the world for its attractive spring blooming flowers, in some of those areas, it has escaped cultivation and become a weed species.
Split into simpler sentences: This species is native to Eurasia and has been cultivated in many other areas of the world for its attractive spring blooming flowers. In some of those areas, it has escaped cultivation and become a weed species.