Non-productive land is the name given to uncultivated areas of open land. They are usually found near the outskirts of towns and cities. Humans use these land areas as storage places for various things, such as snow during the winter and sand during the summer. 

Because they are not used for other purposes, areas of non-productive land are often rich in plant life. 

An example of a plant that thrives in non-productive land areas is the mugwort (pictured on the right). It can grow almost two meters tall. 

The mugwort also produces a lot of pollen every year, which makes it a difficult plant for people with pollen allergies. This is why mugworts are often weeded out from urban areas.