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Allamanda Yellowing at Sprinkler Head: Drainage Fix or Relocate

Diagnosis

Yellowing only at sprinkler head = excess water + poor drainage.

Options

Move sprinkler head.
Replace with moisture-tolerant plant.

Why Not Just Reduce Water

Watering ban already limits to 1×/week. Drainage is the core issue.

Shrubs: Sprinkler Head Runs Non-Stop? The Valve Diaphragm Is Stuck Open; Rain Jet Sprinkler Head Replacement—Modern Brand Substitution; Sprinkler Head Seeping: Solenoid Swap Test Isolates Valve Fault; Adjusting Sprinkler Head Distance – K-Rain Rotor Needs Allen Wrench; Toro Super 800 Rotor Won't Pop Up or Rotate – Replace Heads; Selecting Rotary Heads and Pipe Sizing for a 110' x 100' Front Lawn; Replacing a Hunter Pro-C Sprinkler Head; Two Heads Dry on One Zone: Valve, Pipe, or Clog; K2 Sprinkler Adjustment: Center Slot Sets Left Stop, Side Slot Unknown; Sprinkler Head Adjustment: Stop Waste, Water Smarter

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