A volunteer radish–I think it is a daikon–sprouted up in a little clear pocket of our yard. We let it go, ignored it. It grew bigger, and bigger, and bigger. Usually a radish is harvested early, so we never see how big they can get.
This one got huge, then burst out into hundreds of tiny purple flowers. Hummingbirds, honey bees and all sorts of flying insects visit it all day, every day. It has become one of the queens of the garden.
The picture below is horrible. The radish plant really is quite pretty, the equal of any ornamental flowering shrub–but as bad is the picture is, it gives you some scale. See the bales of our straw bale garden behind it? I think it must be pulling water from there, which accounts for its size and longevity. It’s gone a little past its prime now– a couple of weeks ago the blooms were thicker.
By the way, radish blossoms are tasty food for people, too.