Nina Caldwell
Golf courses use a variety of grasses, each with its own unique characteristics and maintenance requirements. The type of grass and its length can significantly impact the game. Grass on golf courses is meticulously maintained, with different areas, such as the fairways, tees, and greens, requiring distinct mowing heights. The grass on greens is typically the shortest, often mowed to less than a quarter of an inch, providing a fast and smooth surface for putting. Achieving and maintaining such low heights require specialized equipment and expertise.
| Characteristics | Values |
|---|---|
| Grass type | Bermuda grass, Kikuyu, Poa annua, Rye grass, Fescue |
| Grass height | 1/10 inch to 1/2 inch, depending on the area |
| Mowing frequency | Daily or every other day |
| Grass maintenance | Watering, fertilizing, aeration, overseeding, use of PGR (Plant Growth Regulator) |
| Mowing equipment | Reel or cylinder mower, standard rotary mower |
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What You'll Learn
- Grass type: Bermuda, poa annua, kikuyu, and rye are common types
- Mowing: Golf courses use special mowers that work like scissors
- Maintenance: Grass is cut, watered, and fertilised daily
- Height: Grass is cut to 1/8 of an inch on putting greens
- Cost: Maintaining low mowing heights is difficult and expensive
Grass type: Bermuda, poa annua, kikuyu, and rye are common types
Bermuda grass is a thin-leafed grass with light blue-green leaves. It has excellent wear, drought and salt tolerance, and can withstand high traffic. It is a common warm-weather grass found on southern lawns and golf courses. Bermuda grass is also used for roadside bank stabilization and pastures.
Poa annua, or annual meadow grass, is a widespread low-growing turfgrass in temperate climates. It is commonly found on golf courses, particularly on the west coast of the US, and is generally used as putting green grass. Poa annua has a smoother surface than Bermuda grass, but it has a bumpier texture in the afternoons. It is considered a weed in most lawns and tends to sprout at the end of the day.
Kikuyu is a resilient grass that is well-suited to areas of heavy use, as it can quickly recover from excessive footfall. It is often found on sports pitches, parks, and golf courses. Kikuyu is a spongy, almost astroturf-type grass native to Africa. It grows dense and lush, which makes for a tricky texture when kept short. Kikuyu goes dormant in the winter, so it is not suitable for cold-weather lawns or golf courses.
Rye is a quickly-germinating cold-weather grass found on lawns in the northeast and midwest of the US. It is used to overseed golf courses in the winter months when other grasses go dormant.
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Mowing: Golf courses use special mowers that work like scissors
Golf courses use special mowers that work like scissors to cut the grass to an extremely precise length. The bottom knife, also called a bed knife, can be raised and lowered to reach the desired height of cut, which can vary from 0.1 inches to 2.5 inches depending on the area of the course. For example, the fairways are often cut at half an inch, while the tees are usually cut at about 4/10 of an inch, and the greens are mostly cut at 1/10 of an inch or slightly higher.
The type of mower used on golf courses is typically a reel or cylinder mower, which can have multiple blades. These mowers are designed to handle the specific challenges of maintaining a golf course, such as undulating terrain and varying grass heights. For instance, the Ventrac Contour Mower is built for precision mowing on golf courses with challenging terrain and can flex up to 20 degrees up or down to follow the terrain.
The maintenance of golf courses requires a significant amount of time and effort. This includes daily mowing and watering, as well as weekly fertilizing and yearly aeration and overseeding. The grass on golf courses is also genetically engineered to be cut short and treated with Plant Growth Regulators (PGR) to control its growth. Additionally, the greens are rolled in certain directions to affect how the ball plays and for aesthetic reasons.
The use of autonomous mowers on golf courses is an emerging trend. Small, rotary-style autonomous mowers, typically used for home lawns, are now being utilized on golf courses. However, large-area, reel-style autonomous mowers are not yet commercially available in the US due to regulatory issues surrounding safety and liability. The adoption of autonomous mowers raises questions about the potential reduction in the workforce required to maintain golf courses, as well as the viability of this technology at a smaller scale.
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Maintenance: Grass is cut, watered, and fertilised daily
Maintaining golf grass is a meticulous task that requires dedication and knowledge. One of the most critical aspects is mowing, which needs to be done frequently to achieve the desired turf height and quality. Golf greens are typically mowed daily to maintain a smooth and consistent playing surface, while fairways are cut every other day. The shorter the grass, the more frequent the mowing to preserve the turf's health and appearance.
The type of grass also plays a significant role in determining mowing height and frequency. For example, Bermuda grass, a common warm-weather grass, is often mowed to a fraction of an inch in length. To achieve this, it is recommended to cut no more than one-third of the grass length in a single mowing session. This practice reduces stress on the turf and prevents excessive thinning due to a lack of sunlight required for photosynthesis.
In addition to mowing, watering and fertilising are crucial components of golf grass maintenance. Proper irrigation ensures optimal growth and prevents the turf from drying out. Advanced irrigation systems deliver water in a precise and controlled manner, catering to the specific needs of different areas on the course. Fertilisation provides essential nutrients to the grass, enhancing its durability and promoting growth.
Golf course management also employs various techniques to improve turf health and playability. These include verticutting, which thins the turf by removing built-up thatch, and aerification, which creates small holes for better air, water, and nutrient absorption. Additionally, weed, pest, and traffic control are essential to maintaining the pristine condition of the grass.
Overall, maintaining golf grass is a complex and labour-intensive process that demands a precise combination of mowing, watering, fertilising, and other cultural practices to create the desired playing surface for golfers.
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Height: Grass is cut to 1/8 of an inch on putting greens
Golf courses use specialised mowers to cut the grass at various lengths, depending on the type of grass and the area of the course. The grass on putting greens is typically cut to a height of about 1/8 of an inch, which is remarkably short. To put it into perspective, this is slightly less than the thickness of two quarters stacked together.
Achieving such a low cutting height requires the use of specialised reel mowers, which differ from the common rotary mowers used for residential lawns. These mowers work like a giant electric shaver, with a bottom knife or bed knife that can be adjusted to reach the desired height. The grass on putting greens is cut shorter than that on other parts of the course, such as the fairways and tees, which are usually maintained at a height of around half an inch or slightly less.
The short grass on putting greens provides golfers with a fast, smooth, and consistent playing surface. Maintaining this surface requires a significant amount of effort and expertise. Golf course groundskeepers must mow and water the greens daily and fertilise them weekly. They also need to aerate and overseed the greens annually. Additionally, they may use Plant Growth Regulators (PGRs) to control the length of the grass.
The type of grass used on golf courses also plays a crucial role in achieving the desired height. For example, Bermuda grass, a common choice for tees, is known for providing a firm, fast, and true surface when mown short. Other grass types, such as rye grass, are less suitable for greens as they require more water and do not handle heat well when cut too low. Fescue, on the other hand, is a popular choice for greens as it requires less frequent mowing and water.
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Cost: Maintaining low mowing heights is difficult and expensive
Maintaining golf grass at low mowing heights is a difficult and expensive endeavour. The greens are the most essential element of any golf course, and they are also the most expensive to maintain due to the labour and equipment required.
The cost of maintaining a golf course varies depending on location, with Hawaii being the most expensive state, costing around $1.44 million a year, followed by the southwestern U.S. at $1.05 million. The cost of labour is a significant factor, accounting for 50-60% of the total maintenance cost. The greens require frequent mowing, rolling, and hand-watering to prevent burning out, which is time-consuming and costly.
Additionally, the type of grass, fertilisers, fungicides, and mowing frequency are determined by highly educated management. The grass must be genetically engineered to withstand short mowing, and the use of Plant Growth Regulators (PGR) is common to achieve the desired grass length. The mowing equipment itself is also specialised and expensive, with reel or cylinder mowers that work like large electric shavers.
To save costs, golf courses can choose grass seed varieties that require less frequent mowing, are adapted to the local climate, and resist pests naturally, reducing yearly expenses. Kentucky bluegrass is a popular choice due to its dense coverage, adaptability to various soils, and quick recovery from divots or wear, reducing the need for repeat seeding or turf replacement.
Overall, maintaining golf grass at low mowing heights requires significant investments in labour, equipment, and strategic turf management, making it a challenging and costly task.
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Frequently asked questions
The grass on golf courses varies in length depending on the type of grass and its use. The grass on greens is typically kept shorter than the grass on fairways and tees. Greens are often mowed to less than 0.25 inches to provide a fast, smooth, and consistent playing surface, while fairways are usually cut at around half an inch, and tees at about 4/10 of an inch.
There are several types of grass commonly used on golf courses, including Bermuda grass, rye grass, kikuyu, poa annua, and fescue. The choice of grass depends on the climate, season, and desired playing conditions. For example, Bermuda grass is commonly used in warm weather, while rye grass is often used for overseeding in autumn.
Maintaining short grass lengths on a golf course requires specialized equipment, regular mowing, and a precise fertilizer regimen. Grounds crews use reel or cylinder mowers, which work like scissors, to cut the grass at the desired height. They also water the grass daily and fertilize it weekly. Additionally, they may use Plant Growth Regulators (PGRs) to control the growth and push more subterranean growth for sustainability.
