Last year I converted some dead space in my backyard to a wildflower garden, and I started by sowing a few packets of wildflower seeds indigenous to Ohio. This summer is the first time the garden produced any meaningful amount of flowers.I have been trying to avoid the temptation to manage the space, which would sort of defeat the purpose of creating a "wildflower" garden. After all, if I extensively weed and selectively promote the growth of certain plants over others, I am just creating another artificial landscape, albeit with flowers considered to be wild.
I did draw the line at the raspberry runners, though. If I took a laissez faire approach to the raspberries, inevitably I would just wind up with another raspberry patch, as these plants are quite hardy and they dominate a given space.