An attractive ground-hugger with grey foliage and masses of light yellow clusters of flowers in the spring. Vigorous and showy; prune it hard back after flowering.

Sow from late January to July on the surface of a good seed compost. After sowing seal the seed container in a polythene bag and don't exclude light. Make sure that the compost is always moist but not over-wet. Germination takes 10-30 days at 15-18C (60-65F).

Once most of the seeds have come up, lower the temperature slightly. When large enough to handle, transplant the seedlings into 7.5cm (3in) pots, and grow on cool and well lit. In Autumn or early spring plant out where they are to flower 45cm (18in) apart in full sun and a rather poor, well drained soil.