Red Seal Landscape Horticulturist Practice Exam

Why is mulch commonly used in landscaping?

1. To attract pests

2. To minimize soil erosion and retain moisture

3. To provide shade to grass

4. To increase soil temperature

The correct answer is: To minimize soil erosion and retain moisture

Mulch is commonly used in landscaping primarily to minimize soil erosion and retain moisture. When applied to the surface of the soil, mulch acts as a protective barrier, reducing the impact of rainfall on the soil and preventing soil particles from being washed away. This is particularly vital in areas prone to erosion, where the stability of the soil is crucial for plant health and growth. Additionally, mulch helps to retain moisture in the soil by reducing evaporation. This is especially important during dry periods, as it allows the soil to remain moist for an extended duration, benefitting the plants and reducing the need for frequent watering. By conserving moisture and protecting against erosion, mulch supports overall plant health and reduces maintenance efforts in landscaping. While mulch does offer temperature regulation benefits and can provide some shade, its primary roles are focused on erosion control and moisture retention, making it an essential element in effective landscaping practices.