Organic Nutsedge (Nutgrass) Control in Bermudagrass

The Organic Approach

Nutsedge thrives in compacted, wet, biologically poor soil. The solution mirrors other tough weeds: apply sugar (1 lb/250–300 sq ft) spring and fall, water deeply. This feeds microbes that improve soil structure and fertility, making conditions unfavorable for nutsedge.

Addressing Clay Compaction

If the lawn has heavy clay (common in North Louisiana), nutsedge will persist until drainage improves. The author’s recipe for clay:

• 4 bags cedar bark mulch (repels insects, decomposes in 2 years)
• 1 bag peat moss (omit if soil already acidic)
• 1–2 bags humus
• Till 1:1 with native clay to 6–8 inch depth.

Cedar mulch also repels termites, fleas, ticks—bonus for pet owners.

Transitioning

If using fertilizer, apply it with sugar and water in together to buffer microbial kill. The author hasn’t fertilized in 5+ years; sugar alone maintains a thick, weed‑free Bermudagrass lawn.

Beneficial Wildlife

Lizards, toads, snakes, and soil roaches (natural aerators) replace insecticides. Rosemary sprigs indoors deter household pests.