The answer to 'types of mulch' is that there are several common types of mulch used in landscaping, each with its own benefits and drawbacks. The most popular types include wood chips, bark nuggets, pine needles, leaves, and straw.
Wood chips are a classic mulch option that help retain moisture, suppress weeds, and add organic matter to the soil as they break down. Bark nuggets are similar but tend to last longer and have a more decorative appearance. Pine needles are acidic and work well around acid-loving plants like azaleas and rhododendrons. Leaves and straw are inexpensive and can also be used as mulch, though they may need to be replenished more often.