Greenkeepers, also known as groundskeepers, are responsible for the maintenance and upkeep of outdoor areas such as parks, golf courses, and other recreational areas. They are responsible for mowing, trimming, fertilizing, and watering the grass, as well as controlling weeds and pests. They may also be responsible for planting trees, shrubs, and flowers, and maintaining pathways and other features. Greenkeepers must have a good knowledge of plants and soils, as well as the ability to use and maintain tools and equipment.