Our October Weed of the month is Reed canary grass (Phalaris arundinacea). Reed canary grass is common to find along any body of water or where soil is moist like drainage ditches. The maximum 8 foot height of this grass makes it notable as it tends to stand much taller than other grasses. This species is sometimes beneficial in small areas as it provides food for insects and Canada Geese. However, it becomes problematic when it begins to creep.

Reed canary grass is an aggressively spreading species and does so primarily through rhizomes, or underground lateral shoots. Left unmanaged, this species easily outcompetes other riparian plants such as native rushes and sedges. Because it is rhizamotous, Reed canary grass is challenging to control once established. The grass is able to persist and regrow from rhizome fragments, making mechanical removal feel counterintuitive.

For new, small patches of this grass, it is recommended to manually dig up the grass along with as much as the rhizome network as possible. However, at larger scales, mowing is likely necessary. Once mowed, place black tarp over the affected area and secure with ground staples. Leave in place for 1 year. Another option would be to apply a grass-specific herbicide that is labeled safe for aquatic use. Consult with a local licensed herbicide applicator for more information.

NEW! A Weed of the Month Archive page is now available!

Want to go back and see previous weed species featured throughout the months? A weed of the month page is now available. Now, you can see all of the species covered at a glance. Visit the page below!