Our Newest #1 Turf Weed

Actually, it’s not new, because it’s been around for at least 15 years, but it’s growing in its ability to ruin the perfect sward.  It’s called “European bluegrass”, or “roughstalk bluegrass”, which are polite names for Poa trivialis.  Most of us just call it, “triv.” It is a bona fide cultivated bluegrass variety, often found in “shady mixtures” (not ours!), and it’s a frequent contaminant in Kentucky bluegrass seed, and even turf-type fescue seed. Because of it’s floppy habit and lime green color, it looks particularly offensive in a nice sward of dark green Kentucky bluegrass.