Grass pollen is a fine powder produced by grass plants during their reproductive cycle. It is released into the air to fertilize other grass plants, helping them to reproduce. Grass pollen is a common allergen, especially in spring and summer, when many grasses release their pollen. When inhaled, grass pollen can trigger allergic reactions in sensitive individuals, leading to symptoms like sneezing, runny nose, and itchy eyes. Common types of grasses that produce pollen include Bermudagrass, Kentucky bluegrass, and Timothy grass. Monitoring pollen levels can help people manage their allergies effectively.