One of my favorite green roof plants rich in ethnobotanical history is Yarrow.
|Green Roof Achillea millefolium, ethnobotanical wonder and living roof beauty|
Her Mexican name is plumajilla or ‘little feather’ due to the feathery shape of her leaf.
Important to biodiversity support, many birds (including sparrows) use the soft leaves of the plant to line their nest. The leaves are quite soft and add a blanket of light green color across the green roof for much of the spring and early summer. When the blooms began to appear during late May and June the plant sends up shoots, supporting beautiful umbells of flowers.
|MetroVerde Green Roofs supporting biodiversity on many levels, Yarrow|
Yarrow can tolerate hot, dry soils with little organic material. A member of the Asteraceae family the plant is very drought tolerant once established. The flowers add a variety of surprisingly bright color to the green roof as many other flowering plants are seeding out and loosing their color. The perennial plant usually comes back and flowers reliably, year after year.