Name a method used for controlling landscape weeds.

Mulching is an effective method for controlling landscape weeds because it helps suppress their growth by blocking sunlight, which is necessary for seeds to germinate. When organic or inorganic materials are spread over the soil surface, they create a barrier that limits the exposure of weeds to sunlight, thereby reducing their ability to photosynthesize and grow. Additionally, mulch can retain soil moisture, regulate soil temperature, and improve the overall appearance of the landscape. This technique not only helps manage weed populations but also contributes to the health of desirable plants by creating a more stable growing environment.

On the other hand, fertilizing primarily supports plant growth and vigor rather than directly addressing weed control. Irrigating provides water essential for plant health, but without addressing weeds specifically, it can sometimes exacerbate the problem by promoting the growth of both desirable plants and weeds. Pruning is focused on maintaining plant shape and health and does not have a direct impact on weed management. Thus, mulching stands out as a targeted approach to effectively control landscape weeds.