One of my favorite flowers for easy, annual color is the vinca. It can handle full sun, can tolerate a little drought, comes in a huge variety of colors, grows quickly, fills out nicely, and doesn't get leggy. A vinca will pretty much tolerate whatever conditions you give it. The leaves will stay bright and glossy and the flowers will keep on coming. How can you not love it?
New varieties show up all the time, with such variety that there's sure to be one that (or two or three) to complete your color palette. To help you decide, I've decided to showcase several of them today.