https://grasslandrestorationnetwork.org/2026/05/21/testing-shows-confounding-results-a-late-spring-application-of-clethodim-on-mature-reed-canary-grass-did-not-work-but-then-a-second-round-of-clethodim-did-work/grassland restoration networken2026-05-21T12:34:00+00:00Testing shows confounding results. Late spring applications of clethodim on Reed Canary Grass.reed canary grass, Bill Kleiman, invasive plant, Phalaris arundinacea, grass herbicide