Managing Nutsedge in Arizona Bermuda/Rye Lawns: Herbicide Timing and Deep Watering Corrections

Seasonal Transition

Brown turf = ryegrass dying out (cool-season). Bermuda (warm-season) will green up soon. Normal.

Nutsedge (Nutgrass) Control

"Manage" (halosulfuron) works but requires strict schedule:

• 3 applications, 10–14 days apart.
• Consistency is key.

Broadleaf Weeds

Use Trimec or SpeedZone (selective broadleaf herbicides).

Watering Correction

"Water 6–12 inches" is a misunderstood metric. Do not apply 6 inches of water. Instead:

• Water until root zone is saturated (no runoff).
• Re-water at first signs of wilt.
• Deep + infrequent = deep roots.

Fertilization

Every 3 months is reasonable for Bermuda in active growth.