Denver Parks and Recreation follows a rigorous turf management schedule which incorporates proper irrigation, mowing, fertilization and aeration practices to maintain healthy turf and safe playing surfaces. High quality turf outcompetes weeds for light, water and nutrients, preventing large stands of weeds from establishing. Growing a dense, healthy stand of turf is one of the best ways to reduce weed populations and the need for herbicide applications.
Irrigation is a key component for healthy turf. DPR is committed to responsible water use and maximizes irrigation efficiency through active system management and implementation of evolving technologies. Through proper irrigation, grass builds a strong root system resulting in dense stands of turf that is more resilient to pests and drought.
Key components of IPM to grow a vigorous lawn that outcompetes weeds:
- Core aeration: perforating the soil with small holes to allow air, water, and nutrients to penetrate to the root system, helping it to grow deeply
- Slice aeration/vertical cutting: narrow slits in the soil that encourage lateral growth of turf
- Over seeding: periodic application of seed to an existing turf stand to improve its density
- Topdressing: application of a thin, uniform layer of soil or organic materials over the turf surface to improve soil properties and growing conditions while leveling playing fields when minor variations or depressions exist
By focusing on creating strong, resilient turf that outcompetes weeds for water and nutrients, most weed populations are controlled within acceptable thresholds. Targeted chemical applications are only used on turf for:
- Noxious weed control as mandated by the Colorado Noxious Weed Act
- Pest populations dense enough to adversely affect turf health and its ability to provide safe playing surfaces
- Pest populations that prevent seed germination during turf renovation projects.