Stipa gigantea combos... Low-growing plants are ideal companions. The strong lavender-purples of Salvia 'Mainacht' and Verbena rigida work exceptionally well, as does the steel-blue Eryngium x tripartitum. A good evergreen companion is the mid-sized Euphorbia 'Portuguese Velvet', with soft, dark blue-green foliage and acid-green flowers. For late flower colour try the sun-loving Nerine bowdenii, which has delicate pink flowers.
Creating a dry bed stream with stone? - Gardening with Stone Forum - GardenWeb
Salix lanata 'Glanspean' (Dwarf Woolly Willow) - A rare compact willow native to sub-arctic parts of Europe and Asia, Salix lanata 'Glanspean' is similar to the more familiar Salix lantana but with more pointed, hairy silvery-grey leaves and a lower habit. It has golden-yellow catkins in early summer and makes a very ornamental foliage plant.