Agrostis gigantea Roth


Agrostis gigantea is a perennial grass that makes a coarse turf and grows to 2-3 ft. (0.6-0.9 m) tall.
Leaves are bluish green or greyish blue, narrow, sharp and about 0.4 in. (0.95 cm) wide and 8 in. (20.3 cm) long. The stems are slender, growing to 30-40 in. (76.2-101.6 cm) tall.
The inflorescence is pyramidal and reddish in color--hence the common name of redtop. Flowers are yellow in color and bloom mid-spring.
Fruit and seeds begin ripening in early summer. Seeds are very small and brown in color. Agrostis gigantea grows rapidly after seeding.
Ecological Threat
Agrostis gigantea occurs in areas with shallow water, in wet meadows, in grasslands, and along stream banks. It is native to Eurasia.


Selected Images


EDDMapS Distribution

EDDMapS Distribution - This map is incomplete and is based only on current site and county level reports made by experts, herbaria, and literature. For more information, visit

Taxonomic Rank

Kingdom: Plantae
Phylum: Magnoliophyta
Class: Liliopsida
Subclass: Commelinidae
Order: Cyperales
Family: Poaceae
Genus: Agrostis
Subject: Agrostis gigantea Roth


Plants - Grass or Grasslike