Eliminating Crabgrass from Monkey Grass Borders

A homeowner has crabgrass invading monkey grass (liriope) border. Similar root systems make manual removal impossible.

Targeted Herbicide Technique

Paint glyphosate (Roundup) directly on crabgrass blades with a brush—2x label concentration. This avoids monkey grass contact due to tangled roots.

Follow-Up Timing

After one day, glyphosate is absorbed and hormonal disruption begins (forced overgrowth → death). Once leaves yellow, roots have absorbed the herbicide—safe to cut off dead foliage.

Precision application is the only effective selective control for intertwined grass species.