Killing Grass in Liriope Without Harming the Groundcover: Grass-B-Gon Application

The Solution

Grass-B-Gon (Ortho) — selective post-emergent herbicide for grassy weeds in broadleaf beds. Kills grass roots and all; liriope (a lily relative) is unaffected.

How to Use

1. Apply when grass is actively growing (spring/early summer).
2. Spray to wet grass blades — avoid drenching liriope.
3. Grass turns brown in 7–14 days; pulls out easily.
4. Reapply annually as needed.

Where to Find

Garden centers, big box stores, or search “Grass-B-Gon” online for retailers.

Alternative

Hand-digging with a fishtail weeder works for small areas. Preen (corn gluten) prevents seed germination but doesn’t kill existing grass.