I used to watch a children's show (as a grown adult, no less) called The Mysteries of Alfred Hedgehog, which is shown on Qubo, a channel I receive with my antenna to this day. A certain episode revolved around the dye properties of valerian, which is also used as an herb.
Later on, I learned from @LilligantLuna that this herb is also used as a tea, particularly noted for its sleep-aiding traits. I first looked at one of my local tea shops to see if they carried it, and they sent me to the local apothecary (imagine that!), which does carry it in an herbal tea blend.
I don't know if the tea really helps me sleep, but it does taste interesting (in a good way).