The answer to 'how does weed control work' is that weed control involves a combination of methods to prevent and eliminate unwanted plants in your landscaping. This typically includes a mix of manual removal, pre-emergent herbicides, and post-emergent herbicides.
Manual removal involves physically pulling weeds out of the ground, which is effective for small infestations but can be labor-intensive. Pre-emergent herbicides are applied to the soil before weeds germinate, creating a barrier that prevents their seeds from sprouting. Post-emergent herbicides target actively growing weeds, killing them after they've already emerged.