How to Prune common reed?
Cut back in late autumn or winter

common reed · Phragmites australis
Also known as: bennels; carrizo; Danube grass; ditch reed; nal; Norfolk reed; pole reed; spire reed; spires
Grow in deep, moderately fertile, reliably moist soil in full sun; it needs ample space and has the potential to become a nuisance in favourable conditions if not managed well. In riverside, lake or pond areas can be grown in large containers sunk in water to restrict growth and provides ideal habitats for rare and endangered birds.
Cut back in late autumn or winter