Landscape cloth, also known as weed barrier or landscape fabric, is commonly used in gardens and landscaping projects to help suppress weed growth and provide a barrier between the soil and mulch. However, there are several disadvantages to using landscape cloth below bark mulch and we generally don't recommend it.
#1. It Can Reduce Soil Quality: Landscape cloth can impede the natural flow of air, water, and nutrients into the soil. This can result in poorer soil quality and health, potentially limiting plant growth for the plants you actually do want to grow.
#2. Limits The Breakdown Of Organic Matter: By blocking the contact between the mulch and the soil, landscape cloth can limit the breakdown of organic matter from the mulch into the soil. This reduces the benefits of applying mulch, such as improved soil structure and nutrient availability for plants.
#3. Weeds And Grasses Can Still Grow: Over time, organic debris can accumulate on top of the landscape cloth, providing a suitable environment for weeds and grasses to grow. Additionally, some persistent weeds may still grow through the fabric.
#4. Makes Planting More Difficult: Installing new plants or reconfiguring the layout of your garden can be more challenging when landscape cloth is present, as you will need to cut through the fabric to create space for new plants.
#5. Durability Issues: Although some landscape fabrics are designed to be long-lasting, they can eventually degrade due to exposure to the elements, requiring replacement. In some cases, the fabric can tear, rendering it less effective as a weed barrier.
#6. Environmental Concerns: The production and disposal of synthetic landscape cloth can have negative environmental impacts. Some fabrics are made from petroleum-based materials, which are not biodegradable and can contribute to plastic pollution.
#7. Aesthetics: The edges of landscape cloth can sometimes become visible, detracting from the overall appearance of your garden or landscape.
While landscape cloth can be helpful in certain situations, it's important to consider these potential disadvantages before installing it under bark mulch.