Zoysia grass is effectively killed using non-selective herbicides like glyphosate or through persistent physical removal methods such as smothering and digging.

Zoysia grass is best killed using a non-selective herbicide like glyphosate, applied carefully to avoid desirable plants. Multiple applications may be necessary due to its vigorous rhizomes. Alternatively, persistent physical removal, including digging up the turf or smothering areas with opaque materials, offers an effective chemical-free approach.

Using Non-Selective Herbicides

Application: Apply a non-selective herbicide containing glyphosate when the Zoysia grass is actively growing. This ensures the chemical translocates throughout the plant, reaching its extensive root system.

Timing: Optimal application occurs in late summer or early fall when the grass is moving nutrients to its roots.

Repeat Treatments: Due to Zoysia's tenacious nature, expect to apply the herbicide two to three times, waiting 7-14 days between applications. Always follow product label instructions carefully.

Physical Removal Techniques

Digging: For smaller areas, manually dig out the Zoysia grass, ensuring all rhizomes and stolons are removed. This method is labor-intensive but highly effective for isolated patches.

Smothering (Solarization): Cover the affected area with thick, opaque plastic sheeting or cardboard for several weeks to months. Secure the edges to prevent light and air. The lack of light and increased temperature will kill the grass.

Post-Removal Management

Monitor: After removal, consistently monitor the area for any regrowth. Zoysia can sprout from small remaining rhizome fragments.

Replant: Once the area is clear, prepare the soil for new planting to prevent re-infestation.

Comparison of Zoysia Grass Removal Methods

Method	Effectiveness	Timeframe	Effort Level
Non-Selective Herbicide	High, but requires multiple applications	2-4 weeks	Moderate (spraying)
Physical Removal (Digging)	Very High, immediate results	Hours to days (per area)	Very High (labor-intensive)
Smothering (Solarization)	High, chemical-free	4-12 weeks	Low (initial setup)