How can cardboard or metal collars be used effectively in gardens?

Using cardboard or metal collars in gardens is an effective method for reducing the risk of cutworm and millipede damage. Cutworms are larvae that can damage young plants by cutting them at the soil line, while millipedes feed on decaying organic matter but can also harm seedlings. By placing collars around the base of plants, gardeners create a physical barrier that prevents these pests from reaching the tender stems and roots of young plants.

These collars can be particularly beneficial in the early stages of plant growth when seedlings are most vulnerable to pest damage. The barriers not only deter cutworms and millipedes but can also provide some protection against other pests that may be attracted to the plants.

In contrast, while creating a nutrient-rich environment, enhancing sunlight access, and retaining soil moisture are important aspects of gardening, they are not primary functions of collars. Cardboard or metal collars do not directly contribute to soil moisture retention, sunlight access, or nutrient enrichment. Their primary purpose is pest protection, making their use in this context a targeted strategy within Integrated Pest Management practices.