Do you know much about the goldenrod? I do. They grow in northern fields and forests in North America and Europe. They can grow up to 5 feet. When does the goldenrod bloom? They usually bloom in the summer. One interesting fact is that they usually grow near the aster family. Some goldenrods have smooth textures on their leaves. Did you know that goldenrods were used for medicine to treat inflammation in your mouth? Did you know that grasshoppers eat goldenrod? Another interesting fact is that there is a goldenrod spider that only lives on goldenrods. There are many types of goldenrods that look the same like the Blue Stemmed and the Canadian Goldenrod. The yellow ambush bug lives on the goldenrod. These are some interesting facts about a goldenrod.