How to Prune Molinia caerulea 'Dark Defender'?
Remove dead foliage and old flowered stems, just before growth commences in spring

Molinia caerulea 'Dark Defender' · Molinia caerulea 'Dark Defender'
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
Remove dead foliage and old flowered stems, just before growth commences in spring