Greenhouse drying is a method used to remove moisture from crops or materials by utilizing the controlled environment of a greenhouse. This technique takes advantage of sunlight and warm air to accelerate the drying process, making it efficient for preserving the quality of fruits, vegetables, and herbs. The process involves placing the items on racks or trays inside the greenhouse, where they are exposed to optimal temperature and humidity levels. By regulating these conditions, farmers can achieve faster drying times while minimizing the risk of spoilage or mold growth, ultimately enhancing the shelf life of the products.