Goldenrod, I have found your purpose

Yesterday I cut the tops off of about 15 goldenrod stems with full open flowers. They sat overnight in a pot of water and this evening, I boiled the flower stew for about 30 minutes. The result was a very bright, vivid dye bath.

The used flowers:

I simmered alum-mordanted yarn in the strained dye bath for about 15 minutes and got this beautiful color. The yarn really is this golden and I love it!