How Do You Reduce Poa Annually In Tall Fescue?
Annual bluegrass known as poa annua is a fine-textured cool-season grass or an annoying invasive weed, depending on your point of view. Tall fescue is also a cool-season grass, but it is coarsely textured and planted widely as perennial turf grass. There are cultivation practices that will help to manage the spread of poa in fescue but the strategic use of a pre-emergent herbicide in the late summer or early fall may be needed each year to control or eradicate poa in tall fescue. Spray the lawn with a pre-emergent herbicide formulated for annual bluegrass or poa annua in the last week of August or the first week of September. Select a product containing the active ingredients of pendimethalin, prodiamine, dithiopyr, oxadiazon, or oryzalin. Spray according to the product label application and dosing directions, repeating each year as needed to control the poa grass. Mow your tall fescue at a blade height of 3 to 4 inches to shade and crowd out the annual poa grass. Mowing your fescue sh
