Alchemilla mollis (Lady's mantle):
Bright green soft leaves and a froth of acid yellow/green flowers in summer. Very easy for ground cover. Height to 30cm.
Digitalis grandiflora (Yellow foxglove):
Perennial foxglove with yellow bell-shaped flowers above clumps of evergreen lance-shaped leaves. Bee-friendly. Hardy. Up to 1m.
Epimedium perralderianum (Barrenwort):
Tiny lemon yellow flowers held on fine wires above attractive, marbled foliage. Very good in shade, even dry shade
