The answer to 'sprinkler system has weeds' is that weeds growing in your sprinkler system are a common issue, often caused by cracks or gaps in the pipes, improper drainage, or the introduction of soil or organic matter. Symptoms include uneven water coverage, reduced water pressure, and the presence of weeds and other vegetation around the sprinkler heads.
To address this problem, you can try DIY solutions like manually removing weeds, flushing the system, and sealing any cracks or gaps. However, if the issue persists or is more extensive, it's best to call a professional landscaping technician who can properly diagnose and resolve the problem, ensuring your sprinkler system operates efficiently and effectively.