Epimedium sempervirens - Barrenwort

Small. evergreen, understorey shrubs or deciduous perennials, which owe their name to the lightness of their flowers. These very beautiful shade plants can be cultivated in borders or in a large shady rockery, preferably along a path to fully enjoy their great beauty. They can all withstand temperatures as low as  -13°C (8.6°F) without any protection. The highly cold-resistant western species can tolerate difficult conditions, such as living in dense shade under trees, in very dry soil or in moist clay soil.  The Asian species prefer a soil that remains damp to moist in summer, well-drained, rich in humus, without limestone, and can also tolerate dense shade. They all grow relatively slowly, but can live for many years in one place without any special care.