- Position: Full sun, partial shade
- Soil: Moist
- Growth Rate: Average
- Flowering period: Early-mid summer
- Hardiness: Hardy
- Eventual Height: 90-120cm
- Eventual Spread: 60-75cm
Calamagrostis Avalanche, commonly known as Feather Reed Grass, is a clump forming perennial grass with arching green leaves with a central, white stripe. Bearing in summer months, green mauve plumes, maturing into wheat coloured spikes. An effective addition at the back of a border planted in a group to create instant effect. Avalanche provides a more improved impact and vigour than the Overdam.