The Ins and Outs of Managing Creeping Bentgrass (and Poa Annua) Putting Greens at Brickshire

 At Brickshire Golf Club, our putting greens are a blend of creeping bentgrass and Poa annua, requiring a management approach that balances the strengths and weaknesses of both species. Bentgrass thrives in full sun with good drainage, while Poa annua is more opportunistic, often taking over in stressed or shaded areas. To maintain firm, consistent playing conditions, we continually refine our agronomic practices based on data collection, soil testing, and real-time turf performance.

Optimizing Growing Environments

Creeping bentgrass performs best with ample sunlight, good airflow, and well-draining soils. However, shade from trees and poor drainage can create conditions that favor Poa annua encroachment. That’s why we are proposing selective tree removal in 2025 to improve morning sunlight exposure on key greens. Increased sunlight will enhance bentgrass health, reduce frost retention in colder months, and promote firmer, more resilient putting surfaces.

Drainage is another ongoing challenge. While our greens were originally built with drainage, over time, black layer development and high nematode populations have contributed to weaker turf and increased summer stress. To address this, we are proposing to implement HCT Water Solv in 2025. This irrigation treatment system is designed to combat salt accumulation, improve soil structure, and enhance water movement—all factors that should help creeping bentgrass outcompete Poa annua.

                                             

                                        

Data-Driven Agronomic Practices

Since October 2024, we have been collecting and tracking clipping volume on our greens to better understand turf growth patterns. Clipping yield data allows us to make informed decisions on nitrogen applications, plant growth regulator (PGR) rates, and mowing frequency to maintain smooth, consistent surfaces. This data-driven approach helps us prevent excessive thatch buildup while ensuring we don’t overregulate the turf, especially during stress periods.

Our Predictive N program, implemented on greens since September, further supports this effort by fine-tuning nitrogen applications based on actual plant demand. In 2025, we plan to expand this approach to tees and fairways, ensuring consistent turf health across the course.

                                     

Managing Bentgrass and Poa Annua Balance

One of our biggest challenges is managing the differences between creeping bentgrass and Poa annua. Bentgrass has a lateral growth habit, requiring regular grooming, brushing, and topdressing to maintain smoothness. Meanwhile, Poa annua grows more upright and has an aggressive seedhead production cycle, which can negatively impact ball roll if not controlled.

To manage Poa, we rely on a combination of plant growth regulators (PGRs), water management, and fertility adjustments. Paclobutrazol and flurprimidol are key PGRs that help suppress Poa without overly restricting bentgrass growth. However, we adjust application rates based on weather conditions to avoid excessive stress. Additionally, because bentgrass is more drought-tolerant than Poa, precise irrigation practices help us maintain firm conditions that discourage Poa invasion.

Looking Ahead

As we move into 2025, our goal is to refine our greens management strategies even further. With continued clipping volume tracking, predictive nitrogen applications, and potential implementation of HCT Water Solv, we are focused on improving turf resilience, playability, and long-term bentgrass health. By combining agronomic best practices with real-world data collection, we are committed to providing the best possible putting surfaces for our members and guests at Brickshire.

See you on the course!