 A lot of the Stella Dorals and the Happy Returns are constant bloomers. They need to be maintained and cleaned, but they will grow without a lot of water. Black-eyed Susans, and there's a number of Black-eyed Susans. They're all in the Rudbeckia family, so don't be confused. The name Black-eyed Susan doesn't mean it's just one type. You can get them to grow as tall as six feet tall. Shasta Daisies, probably one of the prettiest, very prettiest borders in