The answer to 'why is my sprinkler system weeds' is that a malfunctioning sprinkler system can create ideal conditions for weeds to grow. Leaks, improper coverage, and incorrect watering schedules can all contribute to weed growth around the sprinkler heads.
Weeds thrive in moist, disturbed soil, which is exactly what a faulty sprinkler system can provide. Overwatering, puddling, and lack of proper drainage create the perfect environment for weeds to germinate and spread. Additionally, if the sprinkler heads are not properly adjusted, they may be watering areas that should remain dry, further encouraging weed growth.