The answer to 'mulching turning brown' is that mulch can turn brown due to a few common causes, including lack of moisture, excessive sun exposure, or decomposition. This is often a natural process as the mulch breaks down over time, but it can also indicate issues that require attention.
If your mulch is turning brown, first check the moisture level. Mulch needs regular watering, especially during hot, dry periods, to stay fresh and vibrant. If the mulch is dry and crumbly, increase watering. Conversely, if the mulch is wet and soggy, it may need to be replaced. Sun exposure can also cause mulch to fade and turn brown, so consider adding more shade plants or relocating areas with excessive direct sunlight. Finally, decomposition is a natural process, and you may need to replenish the mulch layer every 1-2 years to maintain the desired color and depth.