The Blue-Silver Heath Perennial Mix, comprising 24 species, combines blue and white flowers from drought-tolerant perennials and grasses with green-silver foliage and a variety of textures. Yucca filamentosa, also known as the garden yucca, is a familiar sight in our gardens. Its striking appearance, with its pointed, spreading leaves and man-high white flowers, makes it a welcome feature in garden design. The blue-stemmed oatgrass, Helictotrichon sempervirens, also impresses with its steel-blue, narrow leaves. The flower panicles extend above the somewhat stiff-looking leaves and sway elegantly in the wind. Another component of the perennial mix is the aromatic Perovskia. Its delicate green-silver leaves exude a certain elegance and are also excellent as solitary perennials. ...