How to get rid of liverwort in lawn?

Identifying and Understanding Liverwort

Liverwort, also called liverseed grass or ricegrass, is a challenging cool-season weed that thrives in Charlotte's shaded, moist lawn areas. This low-growing weed produces distinctive four-angled stems and spreads through both seed and creeping stems that root at nodes. Liverwort is particularly problematic in compacted soils with poor drainage and becomes increasingly difficult to manage as it establishes a stronger root system.

Effective Control Approaches

• Manual Removal: For small patches, hand-pull liverwort when soil is moist, removing as much of the root system as possible. Young plants are easier to remove than established colonies.
• Herbicide Treatment: Post-emergent herbicides containing 2,4-D or MCPA provide moderate control when applied to young, actively growing liverwort in spring. Multiple applications may be necessary for complete eradication.
• Improving Drainage: Liverwort thrives in wet, compacted conditions. Core aeration in fall and spring, combined with grading adjustments, reduces moisture and improves growing conditions for desirable turf.
• Shade Reduction: If liverwort occurs in shaded areas, pruning tree branches to increase sunlight reduces conditions favorable to this weed.
• Grass Density: Maintaining thick, healthy turf through proper fertilization, mowing, and overseeding naturally suppresses liverwort germination and growth.

Long-Term Management

Because liverwort germinates in cool weather and grows during spring and fall, spring herbicide applications are most effective. Persistence is key—one application rarely eliminates the problem. Monitor treated areas throughout spring and summer, and retreated any remaining plants before they produce seed for next year's germination.