I sowed my Painted Lady Runner Beans directly in large 15 gallon pots on June 1. We have lots of beans here at the farm, of assorted colors. Usually we grow them for the pod, of course, but this cultivar is special. It was planted only for the edible bean flower, rather than for the pod.
What's wonderful about vegetable plants, is that a lot of their flowers are edible. Such is the bean. Their flower tastes just like a bean! Their colors vary, too. Most are white, but purple beans have purple flowers. All bean flowers are edible, but this one has two colors (white and red), which makes it showier in edible flower dishes.