How to Prune common rockrose?
Shorten flowered shoots to about 1.5–2.5 cm from the previous year's growth. Prune after flowering has finished.

common rockrose · Helianthemum nummularium
Also known as: flower of the sun
Prefers alkaline to neutral, moist but well-drained soil in full sun, but will tolerate acid soil and dry conditions. Survives well amongst short grass
Shorten flowered shoots to about 1.5–2.5 cm from the previous year's growth. Prune after flowering has finished.