This is a plumbago, a tropical plant that comes back every year for me in zone 8, if I mulch it well. It has sky blue flowers that keep on coming from late May till frost in Louisiana. This would be a great container plant for those living in colder areas. It has a bushy/trailing growth habit that looks really nice in a cottage setting. I've seen them get huge in warmer or protected areas, but you can prune them back if they get out of hand. One of my favorites.