How to prune bluejoint reedgrass

Late winter to early spring (February–March), before new growth emerges. Cut the clump to 3–5 inches with shears or loppers. Also dig out any spreading rhizomes at the clump edges to contain spread. In naturalistic plantings, some spread is acceptable and no intervention is needed.

Annually; rhizome management as needed. Bluejoint reedgrass (Calamagrostis canadensis) is a vigorous native wetland grass. Cut it back hard to 3–5 inches in late winter or early spring before new growth starts. In garden settings it can spread by rhizome; cutting back promptly and removing unwanted runners keeps it in check. No other pruning is needed.

Cut the clump to 3–5 inches with shears or loppers. Also dig out any spreading rhizomes at the clump edges to contain spread. In naturalistic plantings, some spread is acceptable and no intervention is needed.