Goldenrod is a very showy plant that blooms late summer and can be seen in bloom past frost. It grows three to four feet tall. For many years people believed that it was a cause of allergies, but it has been given a reprieve on that sentence. The very name of this plant describes it, golden flowers atop a rod of green. There are roughly one hundred species of goldenrod and thirty of them are known to grow in Kentucky, it is also the state flower for Kentucky. Placing it in a wild garden with wild blue asters would present a beautiful display. Look for them growing along the roadsides.