Annual grasses are plants that complete their life cycle within one growing season. They germinate from seeds, grow, flower, and produce seeds all in a single year. Common examples include crabgrass and ryegrass, which are often found in lawns and fields. These grasses are important for soil health and erosion control. They can quickly establish themselves in disturbed areas, providing ground cover and nutrients. Annual grasses are also used in agriculture for forage and cover crops, helping to improve soil quality and support biodiversity in ecosystems.