How to Prune purple moor-grass 'Dauerstrahl'?
Cut down dead foliage and old flowered stems, just before growth commences in spring

purple moor-grass 'Dauerstrahl' · Molinia caerulea 'Dauerstrahl'
Will grow in full sun or part shade in any moderately fertile, moist but well-drained soil, but prefers neutral to acidic soil. See ornamental grasses cultivation
Cut down dead foliage and old flowered stems, just before growth commences in spring