How to Prune tufted hair grass?
Cut back old stems to the ground in early spring before growth resumes

tufted hair grass · Deschampsia cespitosa
Also known as: hassock grass; tussock grass
Grows well in well-drained to moist but well-drained, humus-rich soils in full sun or partial shade. Prefers acid conditions
Cut back old stems to the ground in early spring before growth resumes