An absolute standout year round, these highly architectural, evergreen plants light up the dark winter landscape with its steely gray green foliage and the dramatic fluorescent yellow stripe down each sword-like leaf. Withstanding poor soils and incredibly drought tolerant once established, it also performs well in containers combined with other evergreen perennials such as Heuchera and red-leafed Euphorbia. It also looks stunning with the vertical spikes of blue Veronica come summer.