9. Evening Primrose
Evening primrose is one of relatively few native wildflowers in the United States. The plant produces flowers from May to July each year, and these bloom at night. The plant can be a valuable addition to any herb garden because of its appearance and because it is very easy to grow. Additionally, all components of the plant can be eaten, and it has also been associated with some medical properties.
Valerian is a perennial plant that blooms with heads of small pink or white flowers. The plant can grow to roughly two feet in height, and it is often used as a decorative plant in gardens. Valerian also has the unusual feature of acting to attract caps, in a similar way to catnip. The plant has also been associated with health benefits, but this mainly comes from compounds in valerian root, rather than from the plant itself.
The name stevia has become very common in recent years, due to the sugar substitute that comes from the leaves of the plant. However, the name also refers to the plant itself, which (unsurprisingly) is also known as sweet leaf or sugarleaf. The leaves of the plant contain the compounds that create sweetness, and the leaves can be eaten or used in foods and drinks to give some sweetness.