How can I effectively apply mulch around shrubs to promote their growth and health?

To effectively apply mulch around shrubs for growth and health, spread a 2-4 inch layer of mulch around the base of the shrub, leaving a small gap around the stem. This helps retain moisture, suppresses weeds, and provides nutrients as it breaks down. Make sure not to pile mulch against the stem to prevent rot. Replenish mulch as needed to maintain a consistent layer.