The answer to 'best mulch' is that the best mulch for your landscaping depends on your specific needs and goals. In general, organic mulches like wood chips, shredded bark, or leaves are excellent options that can improve soil health, suppress weeds, and retain moisture. Inorganic mulches like gravel or rubber can also be used, but they don't provide the same benefits for your plants and soil.
When choosing a mulch, consider factors like the climate, soil type, and plants you have in your landscape. For example, finer mulches like shredded leaves may work better in shady areas, while coarser wood chips may be more suitable for sunny, open spaces. The depth of the mulch layer is also important, typically 2-4 inches is recommended. Be sure to keep the mulch a few inches away from plant stems and tree trunks to prevent rot and disease.