A monoculture is a garden or yard in which only one type of plant is grown. A typical example of a monoculture is a lawn. Monocultures are often practical for decorative purposes. Ideally those areas are counterbalanced with abundant plantings of diverse species of native flowers and trees.Monocultures reduce biodiversity. When you have only one type of plant in your garden, it creates a very limited habitat for the local wildlife. Traditional landscaping practices are also bad for the local wildlife because they often involve using harmful chemicals such as pesticides and herbicides. These chemicals can pollute the air and water, and they can also kill indiscriminately, harming beneficial insects as well as pests.You can help to create a healthy environment for the local wildlife by planting a variety of Illinois native plants in your garden.