The answer to 'mulching has weeds' is that weeds can often grow through mulch, especially if the mulch is thin or has started to break down. This is a common issue that many homeowners face when trying to maintain a weed-free landscape with mulch. Mulch is meant to suppress weeds, but it doesn't always work perfectly, especially if the mulch is not applied correctly or maintained properly.
Some common causes of weeds growing through mulch include: not applying a thick enough layer of mulch (3-4 inches is recommended), using the wrong type of mulch that breaks down too quickly, not removing weeds before applying the mulch, and not replenishing the mulch as it decomposes over time. Symptoms include seeing weeds poking through the mulch and a general lack of weed control in the landscaped areas.