This year's Vincas.
For two years in a row, we have planted exactly none of this. They sprout from whatever seeds were dropped during the previous year. The result is quite a hodge-podge of different colors and flower patterns, but we like it.
The only maintenance we do is to pull weeds occasionally, and toss down a little fertilizer when we get around to it, and water when it's really dry. A benefit is that Vinca is one flower the deer won't eat. We do cut some occasionally for indoor flowers.