In harsh winters, plants can be draped with a single layer of what type of plastic?

The use of polyethylene plastic for draping plants during harsh winters is particularly effective because it provides a balance of insulation and light transmission, which is essential for plant health. Polyethylene is lightweight, flexible, and has good thermal properties, allowing it to help retain heat while protecting plants from frost and cold winds.

This type of plastic is commonly used in horticulture due to its availability and cost-effectiveness. Additionally, polyethylene can create a mini-greenhouse effect, trapping warmth and humidity around the plants, thus creating a more favorable microclimate.

While other materials like polyester and polypropylene have their own advantages, they don't typically offer the same combination of insulation and affordability when used for this specific application. Vinyl, while durable, can be too heavy and may not provide the necessary light transmission required for plant growth under coverings. Therefore, polyethylene stands out as the most suitable choice for protecting plants in winter conditions.