I smelled the grandma of all our valerian plants one Saturday morning in late May. With a sweet vanilla fragrance that's strongest later in the afternoon, valerian (Valeriana officinalis) makes me happy to keep working until dark, just to be in her company. Valerian is so richly fragrant that some old timers call it garden heliotrope.
I love this stuff, and so do the cats. I often dig and dry several slightly stinky valerian roots to keep around as medicine. People take this herb to help with sleep, but for cats and dogs have more fun with valerian. It turns out that valerian's calming effects travel Valium-like neural pathways in the brains of dogs, cats and people.
Yet the vanilla-musk fragrance of valerian takes it far beyond being a medicine-cabinet herb. A few stems in a vase will perfume a room. Indoors or out, fragrant valerian is always a sweet surprise.