One of the finest, and most floriferous perennials we grow is the amazing Berlandiera pumila ‘Chocoholic’. The flowering season is just beginning as you can see in the recent image below. For us, it flowers pretty much non-stop until frost. In early morning, and later in the afternoon, the flowers smell exactly like milk chocolate (some say tootsie rolls), but without the calories. It is also a major attractant for native bees. We have ours planted in our unirrigated parking lot berms, but can’t imagine any sun garden without it. Despite being native from NC to Texas, we find shockingly few people growing this gem. Hardiness is Zone 7a-9b, at least.