Galium odoratum (Sweet woodruff):
Ground-cover plant for dry shade.Delicate clusters of scented white flowers in the spring above fresh green foliage. Loved by bees. Hardy. Up to 30cm.
Geranium nodosum (Knotted cranesbill):
Fast spreading hardy geranium with purplish pink flowers over a long season in summer. A great gap filler. Up to 50cm.