The answer to 'how to care for mulching' is to regularly maintain and replenish the mulch in your landscaping. Mulch helps retain soil moisture, suppress weeds, and insulate plant roots. To properly care for mulch, you should spread 2-4 inches of fresh mulch around plants and trees once or twice per year, typically in the spring and fall. Be sure to keep the mulch a few inches away from the base of plants to prevent rot. Periodically check for and remove any weeds that may grow through the mulch. Over time, mulch will decompose, so you'll need to add more to maintain the desired depth.
If you notice significant thinning or bare spots in your mulch, it's time to replenish it. For large landscaping areas, you may want to consider hiring a professional landscaper to handle the mulching. They have the right equipment and expertise to efficiently spread and maintain mulch across your entire property.