Harper Lin
Frost on golf courses is a common problem that superintendents have to deal with. It typically forms on turf during chilly nights when the grass gets colder than the surrounding air. The impact of frost on the greens is usually visual, and the damage is more apparent in the longer grass of the rough. Frost can cause the grass to turn brown and die, making the turf susceptible to weeds and disease. Walking or driving over frost-covered grass can also rupture plant cells, leading to severe turf damage. Some golf courses implement a Frost Delay to prevent damage, while others allow regular play, considering the damage to be manageable.
| Characteristics | Values |
|---|---|
| Formation of frost | Frost typically forms on turf during chilly nights when the grass gets colder than the surrounding air. |
| Factors influencing frost formation | Temperature, dew points, wind speed, humidity, cloud cover, and wet bulb temperature. |
| Impact of frost on golf greens | Frost can cause severe damage to the turf, making it susceptible to disease and weeds. It can also cause the grass to turn brown and die. |
| Prevention of frost damage | Some golf courses implement a "Frost Delay" by pushing back tee times until the ground has warmed up. Other courses use temporary greens to avoid potential damage. |
| Impact on play | Frost can disrupt regular play and cause delays, especially during winter. |
| Visual impact | The impact of frost is more apparent in longer grass and during early-season frosts when the grass is still growing. |
| Recovery time | It can take more than a month for the grass to recover from frost damage. |
| Turf vulnerability | Walking or driving over frost-covered grass can rupture plant cells and hinder normal growth. |
| Shaded greens | Shaded greens are more prone to frost damage and are the last to thaw, making it challenging to keep golfers off the course. |
| Water content in grass | Grass blades consist of 90% water, which is why they freeze easily and are vulnerable to frost damage. |
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What You'll Learn
Frost delays
The decision to implement a frost delay is crucial because walking or driving over frost-covered grass can cause significant damage to the turf. The ice crystals formed inside the grass plants make them brittle, and foot traffic can rupture the cell walls, hindering normal growth. This damage may not be immediately apparent, but it can cause the grass to turn brown and die within 48 to 72 hours. It can take more than a month for the grass to recover from this type of injury.
Some golf courses choose to continue regular play despite the frost, while others opt for temporary greens or restricted access to certain areas. However, these decisions can lead to severe turf damage, especially if the top layer of soil thaws while a frozen layer remains deeper in the soil. Walking on such turf can cause footprints and unevenness, and the roots can be sheared off, resulting in weaker turf later in the year.
The use of temporary greens or restricted access is a management strategy to promote specific grass species, such as Browntop Bent, which is more suited to cold and frosty conditions. Additionally, shaded greens are more susceptible to frost damage and are often the last to thaw, making it challenging to keep golfers off the course. Overall, the decision to implement a frost delay or continue play depends on various factors, including location, grass species, the amount of play during winter, and the size of the greens.
While foot traffic on frost-covered annual bluegrass has been found to not consistently cause damage in some studies, cart traffic has been shown to consistently reduce turf quality. Therefore, even if golfers can walk on the frost-covered grass without causing visible injury, cart restrictions and adjustments to maintenance practices may still be necessary to protect the greens. Ultimately, the decision to implement a frost delay or continue play rests with the golf course superintendent, who must consider the unique circumstances of their course.
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Cart and foot traffic on frost-covered greens
Frost forms on turf when the grass gets colder than the surrounding air. This typically happens overnight, but frost can also form at sunrise before the temperature begins to rise. When ice crystals form inside the plants, they become brittle and vulnerable to damage.
Golf courses implement "Frost Delays" to prevent damage to the greens. This involves pushing back tee times until the ground has warmed up enough to melt the frost. However, this is not a popular decision as it can cause a backlog of tee times and a significant reduction in revenue.
Foot traffic on annual bluegrass putting greens during frost conditions did not produce visible turfgrass injury in a study. However, this does not apply to other species of turfgrass, and it is poorly understood how turfgrass species are affected by foot traffic during frost. It is also important to note that this research does not consider the impact of golfers carrying heavy golf bags, which could increase the force of their steps and potentially cause damage.
Cart traffic, on the other hand, consistently reduced turf quality and caused injury to frost-covered turf. This includes golf carts and maintenance equipment such as mowers and rollers. Therefore, cart restrictions are recommended during frost-covered conditions, even if foot traffic is allowed.
To summarize, while foot traffic on frost-covered greens may not cause immediate visual damage, it is not recommended due to the potential for hidden plant cell rupture and long-term damage. Cart traffic, however, should be restricted to prevent injury to the turf.
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Turf damage and recovery
Frost forms on turf when the grass gets colder than the surrounding air. This usually happens on chilly nights, but it can also occur at sunrise before the temperature begins to rise. The grass absorbs sunlight and heat during the day and loses heat when the sun goes down. If the sky is clear, there is a greater chance of frost.
Golf courses that are open all year round sometimes experience frost on their fairways and greens. Some courses implement a "Frost Delay", pushing back tee times until the ground has warmed up enough to melt the frost. If frost is ignored and play commences, the grass becomes susceptible to disease and weeds. Frost is frozen dew that crystallizes on the grass, making it hard and brittle. Walking or driving over frost-covered grass can cause the plant to break and the cell walls to rupture, hindering normal growth. It can take grass more than a month to recover from this damage.
To prevent frost damage, it is recommended to lay down the right lawn dressing about a week before frost is expected. This helps the lawn maintain warmth in the soil. After frost has occurred, watering the lawn can speed up the melting process.
While some courses implement conservative frost policies, others allow play during frosty conditions, arguing that it does not cause significant or lasting damage. However, most agree that frost delays negatively impact revenue and golfer satisfaction.
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Grass species management
Frost can cause significant damage to golf greens, and grass species management is a critical aspect of mitigating this damage. While some grass species are more tolerant of freezing temperatures, others are highly susceptible to frost damage. For instance, Bermuda grass is particularly vulnerable, quickly turning brown and patchy, and potentially dying off if the cold conditions persist. In contrast, St. Augustine grass is more resilient, exhibiting only discolouration, which can range from brown and yellow to purple hues.
To effectively manage grass species and protect them from frost damage, several strategies can be employed:
Species Selection
When establishing a golf course, selecting grass species that are inherently more tolerant of frost should be prioritised. This approach ensures greater resilience during cold spells, reducing the likelihood of damage and subsequent recovery periods.
Cultivation and Irrigation
Cultivation practices should be implemented well before the frost season. The soil should be compacted and adequately irrigated to improve heat transfer and retention, making the grass less susceptible to freezing.
Proper Hydration
Deeply watering the grass the evening before an expected frost can be highly effective. As the water slowly evaporates, it generates heat around the grass blades, keeping the turf warmer than the surrounding air, preventing freezing.
Sprinkler Systems
Using sprinkler systems with warm water can melt frost and prevent ice formation. This method is commonly employed by turfgrass managers at golf courses and is more cost-effective and environmentally friendly than using heaters.
Frost Delays
Implementing a "Frost Delay" policy can be crucial to preventing frost damage. This involves delaying tee times and restricting golfers from walking on frost-covered greens until the ground has warmed up sufficiently. While this may cause temporary inconvenience, it is essential for preserving the grass.
Timing of Planting
When planting new grass, it is crucial to consider the timing. Young grass is highly vulnerable to frost damage, so planting too close to the frost season can be detrimental. Allowing sufficient time for establishment before the onset of cold weather improves the grass's chances of survival.
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Revenue implications
Frost delays are known to negatively impact revenue and golfer satisfaction. Some golf courses choose to continue regular play during frosty conditions, possibly to avoid losing revenue from greens fees. However, this can lead to damage to the playing surface, making the grass susceptible to disease and weeds, which may result in further revenue losses.
The decision to proceed with play during frosty conditions involves weighing the potential revenue loss from delays against the risk of damage to the greens. Some courses opt for temporary greens during frosty conditions to reduce wear and tear on the main greens, while others allow play on the main greens, considering the damage to be manageable.
The extent of damage caused by frost depends on various factors, including the type of grass, the depth of frost, and the amount of foot and equipment traffic. Certain grass species, such as creeping bentgrass, are more susceptible to damage during frosty conditions, which can result in delayed tee times and lost revenue.
Understanding the risks associated with different types of traffic on frost-covered turf can help golf course managers make informed decisions to minimise revenue losses. Implementing measures such as restricting visitor numbers, managing grass species, and strategically placing holes can help reduce the impact of frost on revenue.
Overall, while frost delays can result in immediate revenue losses, allowing play during frosty conditions may lead to long-term revenue implications due to the potential damage to the greens. Golf course managers need to carefully consider the balance between short-term revenue gains and the potential for future revenue losses due to course damage.
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Frequently asked questions
Yes, frost can damage golf greens. When ice crystals form inside the plants, they become brittle and vulnerable to damage. Walking or driving over frost-covered grass may cause the plant cells to rupture, leading to dead turf.
Frost forms on turf over chilly nights when the grass gets colder than the surrounding air. Blades of grass are mostly made up of water, which freezes easily, forming ice crystals. When someone walks on the frozen grass, the ice crystals puncture the plant's cell walls, killing the plant tissue.
After the turf thaws, the affected area turns black or brown and becomes sparse. The damage is more apparent in longer grass and when it occurs early in the season when the grass is still growing.
Some golf courses implement a "Frost Delay", pushing back tee times until the ground has warmed up and the frost has melted. Other courses use temporary greens when there is a hard ground frost. Maintenance crews may also lightly spray the greens with a hose to remove frost, but this is not always practical.
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