Centipedegrass Decline: Mowing Height, Fertilizer, and Pre-Emergent Impacts

Three Primary Causes of Decline

Centipedegrass decline—progressive thinning and bare patches in established lawns—typically stems from three manageable factors: incorrect mowing height, excessive fertility, and pre-emergent herbicide interference.

Mowing Height Critical Range

1 to 1.75 inches—no exceptions. Higher mowing allows stolons to layer without rooting; lower mowing scalps stolons, causing drought and sun damage. Both create the patchy decline pattern.

Fertilizer Restraint

• Use 15-0-15 centipede fertilizer (low phosphorus)
• Apply 3 lbs/1000 sq ft in May and July only
• No nitrogen after August
• High phosphorus exacerbates decline

Pre-Emergent Herbicide Caution

Dr. Clint Waltz explains: Dinitroaniline pre-emergents (Team 2G, Barricade, etc.) inhibit root penetration of centipedegrass stolons. When stolons can't "tack" into soil through the herbicide barrier, they desiccate and die.

Remediation: Lightly cultivate bare areas before stolon rooting to disrupt the herbicide layer. Address soil compaction concurrently.

Key Resources

• Centipede Decline – detailed diagnostic guide
• Centipede Lawns – comprehensive maintenance calendar