Identifying and Removing Invasive Perennial Grasses

A thick-bladed, light green grass with single blades (not clumps), a central vein, and new blades emerging from inside old ones is likely a perennial grassy weed—common culprits: Bermuda grass, Johnson grass, or nimblewill. Because it shares the same growing conditions as desirable turf, selective herbicides won’t work; they’ll kill your lawn too.

Options: (1) Spot-treat with glyphosate (Roundup) using a paintbrush on individual leaves to avoid drift. (2) If widespread, spray entire area with glyphosate, wait 7–10 days, then reseed or sod. (3) For small patches, dig out roots completely.

Identify the grass by taking a sample to a local nursery or extension office. Timing: treat when actively growing (late spring–early fall) for best glyphosate translocation.